GIA Diamonds
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | d
🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | c
🗑
|
||||
| diamonds described as "thirds" typically range in weight from : A. 0.25-.30 B. .28-.30 C. .30-.33 D. .30-.37 | show 🗑
|
||||
| show | a
🗑
|
||||
| show | d
🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| Annealing irradiated diamonds can produce: A. intense blue B. emerald green C. D-grade colorless D. brown, orange or yellow | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| show | c
🗑
|
||||
| show | 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 | show 🗑
|
||||
| scientists succeeded in producing lab-grown industrial diamonds for the first time in the : A. 1800s B. 1940s C. 1950s D. 1990s | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| show | a
🗑
|
||||
| show | c
🗑
|
||||
| Which diamond simulant shows noticeable doubling and strong fire? A. CZ B. Xircon C. Synthetic rutile D. Strontium titanite | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | a
🗑
|
||||
| diamond imitations called "paste" are actually: A. glass B. zircon C. synthetic spinel D. rock crystal quartz | show 🗑
|
||||
| show | d
🗑
|
||||
| show | a
🗑
|
||||
| show | c
🗑
|
||||
| show | b
🗑
|
||||
| the diamond imitation thats foilbacked or composed of colorless lead-glass night be called a : A. zircon B. doublet C. synthetic D. rhinestone | show 🗑
|
||||
| show | a
🗑
|
||||
| which of the following is a natural gem: A. YAG B. GGG C. zircon D. Strontium titanate | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | a
🗑
|
||||
| show | 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 | show 🗑
|
||||
| show | 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 % | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | a
🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | d
🗑
|
||||
| show | b
🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| which of the following appears only on fancy cuts? A. culet B. Gridle C. Keel line D. Upper Girdle facets | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| princess cuts are very popular in jewelry designs that call for : A. curved lines B. pave settings C. an antique look D. channel settings | show 🗑
|
||||
| the slightly curved, central areas on the sides of some brilliant fancy cuts are called: A. lobes B. bezels C. bellies D. centers | show 🗑
|
||||
| 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 | show 🗑
|
||||
| culet size should be considered when determining: A. polish B. clarity C. symmetry D. pavilion depth % | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | c
🗑
|
||||
| show | a
🗑
|
||||
| show | a
🗑
|
||||
| show | 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 | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| show | b
🗑
|
||||
| if a diamonds pavilion depth % is 39%, its pavilion angle is approximately: A. 37.8 B. 38 C. 38.4 D. 38.8 | show 🗑
|
||||
| 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 % | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | c
🗑
|
||||
| show | 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 | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| show | b
🗑
|
||||
| show | a
🗑
|
||||
| show | b
🗑
|
||||
| show | b
🗑
|
||||
| show | b
🗑
|
||||
| show | a
🗑
|
||||
| most round brilliants have table % that range from about: A. 35-40 B 45-50 C. 55 -65 D. 70-75 | show 🗑
|
||||
| show | c
🗑
|
||||
| show | 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 % | show 🗑
|
||||
| show | c
🗑
|
||||
| show | 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 | show 🗑
|
||||
| show | c
🗑
|
||||
| the diamonds used as comparison stones for color grading are called: A. D-Z sets B. color stones C. masterstones D. color comparators | show 🗑
|
||||
| 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 | show 🗑
|
||||
| which of the following GIA color grades indicates the greatest amount of yellow: A. D B. F C. G D. H | show 🗑
|
||||
| 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | d
🗑
|
||||
| show | c
🗑
|
||||
| show | b
🗑
|
||||
| show | 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 | show 🗑
|
||||
| the most commonly observed color of fluorescence in gem diamond is: A. blue B. Pink C. green D. yellow | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| A common method of permanently changing the color of a diamond is : A. coating B. irradiating C. laser drilling D. organic dying | show 🗑
|
||||
| show | b
🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | a
🗑
|
||||
| When boron is present in a diamonds crystal structure, it colors the diamond: A. rred B. pink C. blue D. green | show 🗑
|
||||
| show | c
🗑
|
||||
| show | c
🗑
|
||||
| show | c
🗑
|
||||
| show | d
🗑
|
||||
| one factor used to determine the clarity grade of a diamond is an inclusions: A. shape B. texture C. contour D. location | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | a
🗑
|
||||
| the designation SI means: A. slightly included B. Severely included C. several inclusions D. somewhat included | show 🗑
|
||||
| show | 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 | show 🗑
|
||||
| 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 | show 🗑
|
||||
| in a stone with these clarity characteristics, which would probably be the grade setting characteristic: A. Pit B. feather C. pinpoint D. Extra facet | show 🗑
|
||||
| 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 | show 🗑
|
||||
| show | a
🗑
|
||||
| show | d
🗑
|
||||
| show | 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 | show 🗑
|
||||
| blemishes dont usually affect the clarity grade in diamonds below: A. IF B. SI C. VS. D. VVS | show 🗑
|
||||
| which of these would disqualify a stone from being graded IF A. scratch B. pinpoint C. abrasions D. polish lines | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
Celnicki84