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J.A. testing

Jewelers association Test FOR PJC.

A __ _ is the most common and will be used 95% of the time. Setting bur
There are two types of bearing burs, a _ and a 90. A 90 degree bearing bur has a deep Pavillion. The _ degree bur has a very shallow Pavillion 45
There are two types of bearing burs, a 45 and a _. A _ degree bearing bur has a deep Pavillion. The 45 degree bur has a very shallow Pavillion 90
Other _ available are bud, flame, round or ball, krause, inverted cone, concave or cup, square edge, cylinder, tree, florentine, knife edge, wheel, round edge wheel, slim and cone reamers. Bur
The types of _ burs available are vanadium, carbon, and high speed. Steel
_ are used to cut seats for stones, enlarge pilot holes, cutting a void for points in fancy cut stones, removing metal, shaping prongs and finishes. Burs
Burs should be _ frequently. This can be done with bur life, bees wax, or winter green oil. Lubricated
When using a but be sure to have it at _ speed before coming into contact with metal. Cutting
__ tools are concave burnishers. They are used to round off the top of beads and leave a smooth, bright surface. This is called dressing the bead. Beading
Select the proper beading tool by choosing one that sets above the stone but _ the bead. Covers
_ metal around the beading tool is a sign of a too small beading tool. Flared.
Areas that cause beads to snag indicate too _ of a beading tool. Large
If the beading tool is used improperly it can weaken the metal and the _ will fall off. Bead
The last process of a bright cut is the _. Millgrain
The _ of the bright cut should be cut into the seat of the stone. Darts
The pilot hole should measure 2/3 to 3/4 the _ of the stone Diameter
A _ _ graver is used to raise the beads on the bright cut. Half round
A beading tool is used to finish a _ _. Raised bead
__ should be polished to a mirror finish. Gravers
_ gravers with 4/0 emery paper or Rouge on leather Polish
Alcohol is mixed with boric acid to coat the stones and protect the metal from _. Oxidation
The correct bur to use when burning the seat in a bright cut plate is a _ _. Setting bur
Five parts of a graver are: Tang, face, belly, spine, and back.
The shortest gravers are _ _ gravers. Half round
Half round gravers are made to be shorter in order to give them _. Strength
Gravers numbered _ through 49 are flat gravers. 36
Gravers numbered 50 to 63 are _ _ gravers are referred to as the 50 series. Half round
_ and _ gravers are 00 to 10. Onglette and knife
Onglette and knife gravers are 00 to 10. The point should be at _ and _ degree angle 45 and 60
_ gravers are used to remove metal and bright cut. Flat
_ _ gravers are used to raise beads and are made shorter than the other gravers to add strength. Half round
_ gravers are used to cut grooves, trim around beads and layout patterns. They are stronger and cut wider than the knife graver. Onglette
_ gravers are used to trim metal, do layouts, and cut grooves but they are not as strong as onglette gravers and must be used properly. Knife
The face angle of a _ _ graver is 60 degrees. The spine is thicker and the length shorter to give it strength while pushing beads Round bottom
The face angle of a flat gravers is _ degrees. 45
When grinding gravers the tool must be dipped into water to avoid _ the steel. Annealing
The spine of the flat gravers should be __ to make the face smaller, this allows a closet cut around the beads and to help the jeweler see when cutting. Beveled
Longer graver handles are used to _ short geavers. Lengthen
On the Moh's scale of comparative hardness where is the diamond? 10
On the Moh's scale of comparative hardness where is the corundum? 9
On the Moh's scale of comparative hardness where is the Topaz? 8
On the Moh's scale of comparative hardness where is the Quartz? 7
On the Moh's scale of comparative hardness where is the Feldspar? 6
On the Moh's scale of comparative hardness where is the Apatite? 5
On the Moh's scale of comparative hardness where is the Fluorite? 4
On the Moh's scale of comparative hardness where is the Calcite? 3
On the Moh's scale of comparative hardness where is the Gypsum? 2
On the Moh's scale of comparative hardness where is the Talc? 1
The __ __ __ __ is the comparative scale where a higher number can scratch a lower number but a lower number cannot scratch a higher number? IE #10 a diamond will scratch #9 Corundum, #8 Topaz will scratch 7 Tourmaline. Moh's scale of hardness
A steel file has a hardness of __. 6.5
Glass is ___. 5.5
___ is the gems ability to resist scratches and abrasions. Hardness
__ is the ability to resist breakage and cleavage. Corundum is tougher then a diamond. Toughness
__ is an allochromatic stone. One of the most popular colors is green. Tourmaline
Varieties of ___ are Ruby and Sapphire. Red corundum is called ruby and all the other colors including pink are sapphire. Corundum
____ ___ are from living sources. Pearls, amber, coral, ivory, and jet are all organic gems. Organic Gems
____ gemstones have the same physical and chemical properties as the natural gems but they are lab grown. Synthetic
____ stones do not have any properties of the stone it being limited. Imitation stones can be made out of any material that will resemble the stone to be imitated. Imitation
Never quench __ __. It will make the metal brittle. White gold
The five parts of a round brilliant cut diamond are: Table, crown, girdle, Pavillion, and culet.
When viewing a stone from the bottom it is called the ____ view. Pavillion
___ is the hardest substance known to man. It is 10 on the Moh's scale. Diamond
Diamonds are graded under 10X power. If a diamond as internal flaws it is classified as a ___. included
When viewing a stone from the side it is said to be ___ __. edge up
When viewing a stone from the top is __ _. Table up
___ stones are not graded the way diamonds are. Colored
The 4C's stand for: Color, clarity, cut, and carat.
__ refers to the type of cut of the stone. The round brilliant (American cut brilliant) cut is proportioned according to the mathematician Marcel Tolkowksys figures. It has 58 facets arranged to provide maximum brilliancy. Cut
A single cut diamond has __ facets. 18
Color is graded on the __ __ __. Color Grading Scale
Color is graded on the color grading scale, it ranged from D- colorless to _ ____. Diamonds come naturally in all colors, but unless the color is deep and distinct the colorless diamonds command the highest price. Z tinted
__ is the degree to which a diamond is free from blemishes and inclusions. Clarity
__-__ is the size of weight of a gem stone. There are 100 points to a carat and it weight 1/5 of one gram. Carat- weight
The term ___ comes from the uniform carab bean once used to weight diamonds in India. Carat
The Japanese unit of weight used to weight cultured pearls is ____. momme
The diamond weighing one carat measures __ mm across the girdle. 6.5
A __mm diamond is .50 points or 1/2 carat. 5.2
a __mm diamond is 1/3 a carat or .33. 4.4
The term total weight (tw.) or total cart weight (tcw) refers to the weight of several stones ___. together
__ describes the size of ta stone. De Beers classifies diamonds of .25 or less as ___. Jewelers generally refer to .10 or smaller ___ Melee
Diamond, ruby, and sapphire do not usually have to be removed from a setting before ___. soldering
Fancy colored or heavily included diamonds and sapphires should be removed before ___. soldering.
A cluster setting as _ or more stones. 3
The purpose of an ____ ___ is to create the __ of a larger stones. Illusion setting
A setting that is highly polished reflective plate which makes the stone appear larger in size is called an ___. Illusion
__ __ settings are designed to accept several different sized stones. Baker Tops
__ __ is the most common type of setting in the jewelry industry. Prong Setting
Always tighten a ___ ___ by squeezing the prongs together from the size and spreading them back apart. This works the same as pushing past the stone. prong settings
Push prongs over the with a ___ __ by bracing behind the girdle and pushing the opposite prong towards the center of the stone. Alternate prongs until all the prongs are pushed. This is the "X" method. Prong Pusher
When assembling a 6 prong ring there should be a prong aligned at _ and one at _. 12 and 6
a __ __ or a bevel is used to take up space and add to the illusion when bright cutting a small stone into a large plate. double millgrain
__ __ metal is alloyed with copper, zinc, and nickel. Nickel is what makes the metal brittle when quenched. White Gold
__ is an alloyed of copper and zinc. Brass
IF gold is alloyed with a larger percent of __ it will produce red or rose gold. copper
If gold is alloyed with a high percent of __ it will produce green gold. silver
Gold alloyed with aluminum is __. purple
Gold alloyed with iron is ___. Black.
_____ ____ is 92.5% silver and 7.5 percent copper. Sterling silver
Platinum has a melting point of ___ F 3224
24 karat gold melts at ___ F. 1945
14k white gold melts at ___ F. 1825
14k yellow gold melts at ___ F. 1615
18k gold is __% find gold. 75
Mexican Silver is __% silver. 90
____ is a measure of purity and/or fineness. Karat
One troy pound equals __ troy ounces. 12
One troy dwt. equals ___ grains. 24
The B&S gage is used to measure __. wire
___ is mixed with water and heated will dissolve drill bits. Alum
1 part nitric acid, 3 parts hydrochloric makes __ __ (royal water). __ ___will dissolve gold. Aqua regia
__ will contaminate the pickle. Iron
____ #2 is a pickle solution that is for iron. Sparex
___ __ ___ is used for antiquing. Liver of sulfer
___ ___ can be used as a substitute for the ultrasonic. Caustic Soda
____ ___ is the main ingredient in Drano. Caustic Soda
Lye and sodium hydroxide are both ___ __. Caustic Soda
The ___ saw jewelers sawblade is an 8/0. thinnest
Pliers are classified in two groups Those with pivot or rivet and those which have jaws that are ___. Parallel
Created by: MellonKanon