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published whole sale diamond price lists are:
A. sponsored by De Beers
B. valid for London and Antwerp only
C. accurate reports for prices in most wholesale markets.
D. estimates of whole sale prices in a given market at a certain time
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in a good-quality pave-set ring, the diamond will have matching girdle diameters, colors, and:
A. weights
B. table sizes
C. brand names
D. clarity grades
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GIA Diamonds

QuestionAnswer
published whole sale diamond price lists are: A. sponsored by De Beers B. valid for London and Antwerp only C. accurate reports for prices in most wholesale markets. D. estimates of whole sale prices in a given market at a certain time d
in a good-quality pave-set ring, the diamond will have matching girdle diameters, colors, and: A. weights B. table sizes C. brand names D. clarity grades b
if a diamond weighs 1/83 cts. and its price is 13,725, what is its per-carat price? A. 750 B. 7500 C. 13,725 D. 25,116 b
a knowledgeable, experienced, and successful diamond dealer or manufacturer is called a(n): A. sorter B. manager C. Auctioneer D. diamantaire d
A grooved, white, non-reflective tray is used to; A. match sets of stones B. clarity grade VVS and VS Stones C. Hold stones in plane while measuring D. Prepare stones for ultrasonic cleaning a
a rapid and efficient way to sort large numbers of small, round diamonds is to use a(n): A. template B. Sieve set C. electronic scale D. mm gauge b
a scoop is useful for; A. sorting diamonds by color B. sorting diamonds by weight C. picking up groups of small gems D. measuring the diameters of small diamonds c
a group of gems that's packaged together for sale or storage is called a: A. parcel B. sight box C. matched set D. consignment a
when you buy an entire parcel, you can expect to pay a: A. lot price B. pick price C. memo price D. consignment price a
main reason that dealers charge less when diamonds paid for immediate is: A. simplifies bookkeeping B. reduces likelihood of returned goods C. dealers boast of their monthly sales figures D. dealers usually borrow money to finance their own purchases d
dealers who buy diamonds on memo: A. must belong to a dealers' association B. can keep the stones until they are sold C. automatically get a 5% discount on the price D. have the opportunity to inspect stones before buying d
if a diamond weighs 0.76 cts. and the per-ct price is $1400, how much does the diamond cost A. 3116 B. 3120 C. 4000 D. 5395 a
a sorting pad is a : A. weighing device B. type of cleaning apparatus C. grooved, non-reflective plastic tray D. clean and convenient paper surface for examining gems c
diamonds described as "thirds" typically range in weight from : A. 0.25-.30 B. .28-.30 C. .30-.33 D. .30-.37 d
you should expect to pay more when you buy from a dealer: A. on credit B. in parcels C. with cash D. in large quantities a
most lab grown gem-quality diamonds are: A. blue B. pink C. colorless D. yellow or brown d
which one of the following is used today to safely color-treat diamonds: A. x-rays B. radium compound C. ultraviolet radiation D. high-energy electrons in linear accelerator d
whichof th e following is typical of UV fluor of lab grown diamonds: A. Strong blue under both long and shortwave B. blue under long and weak yellow under short C. strong yellow under long and none under short D. yellow to greenish under both d
GIA Lab and other gemological labs: A. don't grade fracture-filled diamonds B. grade diamonds before they fracture fill them C. only treat diamonds with eye-vis feathers D. give fracture filled diamonds grades that are one lower than they appear a
the origin of diamonds color: A. can be determined using a diamond sure B. cannot be determined for most diamonds C. should usually be determined by a gem lab D. can be easily determined with standard gemological equipment c
which of the following is an indication of the HPHT treatment? A. flash effect B. hourglass graining C. Etched or frosted naturals D. color zoning parallel to facet junctions c
Annealing irradiated diamonds can produce: A. intense blue B. emerald green C. D-grade colorless D. brown, orange or yellow d
lab-grown diamond is a: A. natural mineral looks like diamond B. manmade that looks like diamonds C. mandmade w/ essentially same physical, chem, optical properties as natural D. manmade -primarily carbon, diff crystal structure than natural c
the use of lab grown diamonds in jewelry : A. limited by high prod costs B. makes up substantial portion of the market C. limited to fancy-colored melee, which is mostly lab-grown D. currently impossible bc lab-grown diamondstoo highly included a
color treating diamonds in linear accelerator produces: A. distinctive color zoning B. blue or green colors C. usually green or dark green colors D. only shallow penetration of the color b
laser drill-holes A. usually reduce color grade B. dont need to be disclosed C. become perm clarity characteristics D. arent perm, so major labs wont grade them c
annealed diamond color can change is its exposed to: A. ultraviolet rays in sunlight B. heat during routine repairs C. chlorine in swimming pools D. ammonia in cleaning solutions b
which one of the following clarity characteristics might be found in lab-grown diamond? A. xenocryst B. metallic flux C. garnet crystal D. diopside crystal b
scientists succeeded in producing lab-grown industrial diamonds for the first time in the : A. 1800s B. 1940s C. 1950s D. 1990s c
the flash effect proves that a diamond: A. is coated B. is irradiated C.is fracture filled D. had undergone HPHT treatment c
some diamond simulants display "see-through" bc compared to diamond, they: A. display less fire B. have lower hardness C. cant be polished well D. have much larger critical angles d
the easiest way to separate diamond from zircon is by checking for: A. doubling B. see-through C. specific gravity D. refractive index a
which of the following typically has a waxy or granular girdle surfface? A. CZ B. GGG C. Diamonds D. Synthetic Rutile c
Which diamond simulant shows noticeable doubling and strong fire? A. CZ B. Xircon C. Synthetic rutile D. Strontium titanite c
the thermal diamond tester helps separate diamond from simulants bc of diamonds excellent ability to: A. reflect light B. refract light C. conduct heat D. conduct electricity c
all diamond simulants rank lower than diamond in : A. hardness B. dispersion C. fluorescence D. specific gravity a
diamond imitations called "paste" are actually: A. glass B. zircon C. synthetic spinel D. rock crystal quartz a
term "diamond simulant" : A. includes only manmade stones B. means the same as lab-grown diamonds C. refers to stone with at least 1 property the same as diamonds D. refers to stone that looks like diamond but has diff optical, physical, chem props d
the easiest way to separate diamond from synthetic moissanite is by checking for: A. doubling B. brilliance C. refractive index D. thermal conductivity a
whihc of the following properties is higher in GGG than in diamond: A. doubling B. Dispersion C. Specific gravity D. Thermal conductivity c
the easiest way to separate diamond from CZ is by checking for: A. fire B. Doubling C. Thermal conductivity D. Mohs scale hardness b
the diamond imitation thats foilbacked or composed of colorless lead-glass night be called a : A. zircon B. doublet C. synthetic D. rhinestone d
a stone formed by cementing two separate pieces of material together is called a: A. doublet B. lab-grown stone C. assembly D. construction a
which of the following is a natural gem: A. YAG B. GGG C. zircon D. Strontium titanate c
diamond simulants: A, are always manmade B. only look like diamonds C. are the same as lab-grown diamonds D. have the same properties as natural diamonds b
to see a diamonds clarity characteristics that might be hidden by prongs: A. use reflections B. use soft, diffused light C. gently bend the prongs out of the way D. look at the diamond in the face-up position a
the ultimate recutting consideration is : A. how badly the stone is damaged B. how much color can be improved C. how much clarity can be improved D. potential value of finished diamond d
an improvable is a diamond that can be repolished to improve is clarity: A. to flawless B. from I3 to SI2 C. to VVs1 to VVS 2 D. to IF c
When estimating the weight of very small diamonds, graders: A. often use templates B. dont adjust for proportion variation C. use the same techniques as for larger diamonds D. must use more adjustment factors than for larger stones a
what is the correct adjustment factor to use when estimating the weight of an emerald-cut diamond with the following dimensions: Length: 8.40 Width:5.59 Depth:2.85 A. 0.0080 B. 0.0092 C. 0.0100 D. 0.0106 b
the setting that makes it most difficult to estimate a stone's weight is a : A. bezel with open back B. bezel with closed back C. six-prong setting with closed back D. four-prong setting with open back b
which of the following requires the greatest adjustments to estimated weight: A. thick girdle B. long star facets C. shallow pavillion D. steep crown angles a
to find the crown height percentage you must know the crown angle and : A. table % B. avg girdle diameter C. Pavillion depth % D. Girdle thickness % a
the chart of weight adjustment factors begins to apply when the overall gridle thickness is rates as : A. thin B. Thick C. Medium D. slightly thick d
calculate the estimated weight of a round brilliant with the following dimensions: Avg diameter: 7.25 Depth: 5.45 gridle thickness: Very thick A. 1.83 cts B. 1.85 cts C. 1.88 cts D. 2.05 cts a
a diamonds recut style is largely determined by : A. its original cut B. cutter's favorite style C. which style is most in demand D. how many inclusions the cutter can remove a
when you color grade a mounted diamond : A. always remove from mounting B. you have to use mounted masterstones C. hold the mounting face up in the Diamond Lite D. hold its table beside the masterstones table without letting stones touch d
calculate the estimated weight of a heart shaped brilliant with the following dimensions: length:5.58 mm width: 5.51 Depth: 3.21 gridle thickness: medium A: 0.51 ct B. 0.55 cts C.0.58 ct D.0.61 cts c
accurate weight estimation of a mounted diamond requires: A. computer imaging system B. very little skill or experience C. careful measurement and calculator D. making adjustments for proportion variations d
a mounting makes it impossible to: A. appraise a diamond B, accurately weight diamond C. estimate proportions D. locate clarity characteristics b
excessive pavilion bulge on emerald cuts results in: A. excessive weight B. increased beauty C. fewer setting problems D. unattractive length-width ratio a
to calculate the table percentage of a fancy cut, divide the table size by the stones A. width B. length C. avg diamete D. diagonal measurement a
on a marquise-shaped, brilliant cut, pavilion angle variations can result in: A. fisheye B. bow-tie C. pavilion bulge D. dark areas under points b
which of the following appears only on fancy cuts? A. culet B. Gridle C. Keel line D. Upper Girdle facets c
calculate the length-width ratio of the following pear shape length: 7.51mm width: 5.19 A. 1.44:1 B. 1.45:1 C. 1.69:1 D. 1.70:1 b
when you judge a diamonds shape appeal, you consider: A. its bulge factor B. its total depth percentage C. symmetry of its corresponding parts D. whether or not its shape is graceful and pleasing d
where on a fancy cut diamond might multiple facet reflections make it most difficult to detect clarity characteristics? A. belly B. Point C. wing D. Shoulder b
the rounded end of a pear shape stone is called the: A. lobe B. Apex C. head D. wing c
Compared to round brilliants, one difference in the color grading process for fancy cut diamonds is the : A. type of light B. viewing direction C. type of magnification D. shape of the masterstones b
a faceting style that replaces the large bezel facets at the points of some diamonds with star and upper half facets is called : A. star tip B. Bezel tip C. French tip D. Point facet c
On emerald cuts, differences in the angles of the rows of pavilion facets cause: A. wide corners B. pavilion bulge C. bow-tie effect D. shortened culet b
a gem that feature triangular and kite shaped facets that radiate from the center toward its girdle is called a : A. step cut B , mixed cut C. french cut D. brilliant cut d
princess cuts are very popular in jewelry designs that call for : A. curved lines B. pave settings C. an antique look D. channel settings d
the slightly curved, central areas on the sides of some brilliant fancy cuts are called: A. lobes B. bezels C. bellies D. centers c
on an emerald cut diamond very narrow corners should be noted under: A. finish, as a polishing detail B. finished, as a symmetry variation C. proportions, as a shape appeal factor D. proportions, as a length-to width ration variation c
culet size should be considered when determining: A. polish B. clarity C. symmetry D. pavilion depth % d
if a diamonds culet is too large, it will look like A. a small cavity B. an indented natural C. a fuzzy, white speck D. a black spot under the table d
diamond with a thick girdle, steep crown, or deep pavilion represents poor value bc: A. doesnt look attractive B. can't be set into jewelry piece C. appears smaller face-up than weight suggests D. proportions create durability probs in polished stone c
which of the following pavilion depth % would most likely cause the girdle reflection to be visible face-up through the table A. 37 B. 42 C. 45 D. 48 a
the purpose of a culet facet is to: A. prevent chipping B. improve symmetry C. maximize brilliance D. maximize light leakage a
which of the following is part of an evaluation of proportion symmetry: A. scratches B. natural C. Rough Girdle D. laser manufacturing remnants b
the care that goes into the fashioning of polished diamond, as confirmed by its finish, is its: A. cut B. shape C. polish D. craftmanship d
as a diamonds pavilion gets deeper, its table reflection becomes: A. larger B. lighter C. smaller D. more difficult to see a
most diamonds have some symmetry variations: A. that affect value of stone B. but they rarely affect appearance C. that appear both obvious and distracting D. but they dont need to be evaluated when grading b
a diamond with variations in alignment probably also has: A. polish lines B. misshapen facets C. low clarity grade D. an out of round girdle outline b
if a diamonds pavilion depth % is 39%, its pavilion angle is approximately: A. 37.8 B. 38 C. 38.4 D. 38.8 b
calculate the estimated girdle thickness % for the following stone: total depth % 62.8 crown height % 15.5 Pavilion depth % 45.5 A. 1.0% B. 1.5 % C. 2.0 % D. 2.5 % c
lower half facet length is expressed as a % of the : A. girdle-to-culet distance B. table-to-culet distance C. girdle-to-girdle distance D. lower half facet to culet distance a
a diamonds physical shape, inclusing its proportions and durability, determined by decisions made during the fashioning process, is its: A. finish B. polish C. design D. brilliance c
the proportions that play the biggest role in determining a round brilliant diamonds brightness are table %, crown angle, and: A. culet size B. pavilion angle C. crown height % D. Girdle thickness % b
a round brilliant diamonds table size is expressed as: A. excellent, good or fair B. small, medium or large C. ratio of its depth to its diameter D. % of its average girdle diameter d
calculate the table % of a round brilliant with the following measurements: table measurements 4.85mm, 4.85 mm, 4.90mm 4.95 mm min max girdle diameters 7.95mm 8.07 mm A. 59 % B. 60 % C. 61 % D. 63% c
an extremely thick girdle: A. makes a stone easier to set B. creates an unattractive fish eye effect C. reduces a stones durability during normal wear D. adds weight without contributing to the stones appearance d
on a well-made diamond, the girdle will: A. look like a knife edge, B. have just enough thickness to prevent chipping C. show its reflection when viewed through the table D. increase the weight of the diamond without adding to its beauty b
and advantage of the face-up method of crown-angle estimation is that is : A. can be used with mounted diamonds B. can be used for several cutting styles C. can be performed without magnification D. is based on a view of the actual crown angle a
a transparent measuring device divided into mm and tenths of mm, used to measure a diamonds table is called a : A. ruler B. table gauge C. micrometer D. tape measure b
calculate the total depth % of a diamond with the following dimensions: Depth 4.70 mm AVG Girdle diameter 6.54 mm A. 71 % B. 71.9 % C. 72% D. 72.1% b
when using the ratio method for estimating table %, a 1:1 1/4 ratio indicated a table of approximately : A. 54% B. 60% C. 65& D. 69% b
a weight retention method that adjusts the angles of some facets to allow proportions of a diamond's girdle to be thicker is called: A. Painting B. digging out C. brillianteering D. final polishing a
most round brilliants have table % that range from about: A. 35-40 B 45-50 C. 55 -65 D. 70-75 c
if a diamonds minimum girdle diameter is 4.62 mm and its max is 4.65mm, then its avg is : A. 4.625mm B. 4.630 C. 4.635 D. 4.640 c
when using the bowing method, star facets that reach one third of the way toward the gidle make the lines appear: A. straight B. irregular C. to bow in D. to bow out d
what is the crown height % of a diamond with a crown angle of 32 degrees and a 60% table? A. 11.5 % B. 12.5 % C. 12.8 % D. 13.7 % b
the crown angle is the angle formed by the girdle plane and the : A. table B. star facets C. bezel facets D. upper half facets c
if a diamonds total depth % is 51%, its cut grade will be: A. superior or excellent B. excellent or very good C. very good or good D. fair or poor d
the color grade of a diamond that appears darker than the H masterstone but lighter than the I would be : A. G B. H C. H-I D. I b
which of the following makes a diamond unsuitable for a masterstone set? A. si1 clarity B. yellowish body color C. very strong fluorescence D. about 43% pavilion depth c
the diamonds used as comparison stones for color grading are called: A. D-Z sets B. color stones C. masterstones D. color comparators c
trade terms that describe diamond color: A. can be misleading B. are accurate for certain stones C. are usually very clearly defined D. are based on the names of famous diamantaires a
which of the following GIA color grades indicates the greatest amount of yellow: A. D B. F C. G D. H d
Subtle color differences are usually more visible when seen: A. face-up B. through the pavilion C. through the bezel facets D. through the crown facets b
if a diamond has a slight tint in the face down position and appears colorless in the faceup position its estimated color grade would be: A. A D E or F B. G H I or J C. K L or M D. N to Z b
GIA Gem trade laboratories uses a Z mastersone to determine: A. blues B. pinks C. greens D. yellows d
the most widely accepted lighting for color-grading diamonds is: A. darkfield B. ultraviolet C. balance of darkfield and ultraviolet D. balanced, day light equivalent fluorescent light d
a masterstone graded as a whole grade represents the: A. middle of a color grades range B. least amount of color possible in that grades range C. consensus of what the trade believes that color to be D. greatest amount of color possible in that range b
a loos brown diamond should be color grades: A. using a 10x loupe B, as a range of colors C. as a top light brown D. against a yellow masterstone set d
when color grading with masterstones, you should: A. compares unknown only on left side B. compare unknow only on right side C. move unknown to compare on both sides of master D. move masterstones to compare on both sides of unknown c
colorless diamonds are more valuable than others in the normal color range because they : A. do not fade: B. are more rare C. have fewer inclusions D. look better in yellow gold mountings b
diamonds outside the normal color range are grades: A. face up B. face down C. through the girdle D. from the pavilion view a
the basic face up color of a colored diamond is know as its A. real color B. actual color C. apparent color D. characteristic color d
the most commonly observed color of fluorescence in gem diamond is: A. blue B. Pink C. green D. yellow a
which of the following diamond colors would be the most valuable, all other factors being equal? A. red B. gray C. brown D. Deep yellow a
a noticeable "oily" appearance seen in some diamonds is usually the result of : A. very strong fluorescence B. failed attempt to bleach the color C. poorly applied colored lacquered coating D. radioactive residues from an artificial coloring process
A common method of permanently changing the color of a diamond is : A. coating B. irradiating C. laser drilling D. organic dying
the relative lightness or darkness of a color is called its : a. hue B. tone C. intensity D. saturation b
the basic causes of a diamonds color are its crystal structure and: A. refractive index B. absorption index C. strength of saturation D. chemical composition d
a structural defect that influences a gems absorption of light is called a(n): A. color center B, lattice strain C. impurity center D. absorption center a
the emission of visible light by a material when its exposed to ultraviolet radiation is called: A. UV light B. atomic glow C. Fluorescence D. spectral emission c
type IIb diamonds contain: A. boron B. helium C. Sodium D. potassium a
When boron is present in a diamonds crystal structure, it colors the diamond: A. rred B. pink C. blue D. green c
the most common colored diamond color is : A. pink B, Green C. brown D. orange c
diamonds that are colorless to light yellow, brown, and gray fall into the : A. body color range B. basic color range C. normal color range D. tone and saturation range c
when a gem absorbs some wavelengths of light and transmits others, the process is called: A. color selection B. spectral absorption C. selective absorption D. selective trasmission c
Type I diamonds contain: A. iron B, Boron C. Carbon D. nitrogen d
one factor used to determine the clarity grade of a diamond is an inclusions: A. shape B. texture C. contour D. location D
inclusions are usually most visible when theyre located: A. below the girdle B. on the girdle plane C. under the crown facets D. directly under the table d
on a plot, drawing a characteristic only in green indicated that its : A. a blemish B. part of a mounting C. a surface reaching inclusion D. an inclusion totally enclosed within the stone a
the designation SI means: A. slightly included B. Severely included C. several inclusions D. somewhat included a
a feather that reaches a bezel surface as well as the surface of the pavilion main directly under that bezel: A. doesnt need to be plotted B. should only be plotted on crown diagram C. should be plotted only on pavilion D. should be plotted on both d
the more an inclusion differs in color from its host diamond: A. the less obvious B, the more obvious C. more valuable the diamond is D. the higher the clarity grade b
inclusions or blemished that establish the clarity grade of a diamond are collectively called : A, markers B. highlighters C. indicator characteristics D. grade-setting characteristics d
in a stone with these clarity characteristics, which would probably be the grade setting characteristic: A. Pit B. feather C. pinpoint D. Extra facet b
diamonds with minute inclusions that range from difficult to very difficult to see under 10x are classified as: A. IF B. SI1 or SI2 C. VS1 or VS 2 D. VVS1 or VVS 2 d
VS 1 stone and VS2 stones might have: A. minor included crystals and feathers B. inclusions that might threaten durability C. Minute inclusions and insignificant blemished D. a few scattered pinpoints and light surface graining a
a stone with only a few extra facets on its pavillion that cant be seen face up should be graded: A. IF B. VS1 C. VVS1 D. Flawless d
in most cases the easier it is to see the clarity characteristics, the : A. less durable B. lower clarity grade C. more durable D. higher the grade b
a round brilliant cut VVS diamond could have: A. laser drill hole B. smaller feather under the table C. an included crystal under a star facet D. a small pinpoint under a lower half facet d
blemishes dont usually affect the clarity grade in diamonds below: A. IF B. SI C. VS. D. VVS a
which of these would disqualify a stone from being graded IF A. scratch B. pinpoint C. abrasions D. polish lines b
Created by: Celnicki84
 

 



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