Shared Flashcard Set

Details

Diamond Essentials 1
Diamonds and Diamond Value
35
Other
Professional
04/13/2018

Additional Other Flashcards

 


 

Cards

Term
Baguette
Definition
a small, four-sided step cut that's rectangular, square or tapered
Term
Blemish
Definition
clarity characteristic that's confined to the surface of a polished gemstone
Term
Branded Cut
Definition
cutting style that's developed, named, and promoted by a specific manufacturer
Term
Brilliance
Definition
the brightness created by the combination of all the white light reflections from the surface and inside of a polished diamond
Term
Brilliant Cut
Definition
cutting style with triangular or kite-shaped facets that radiate from the center toward the girdle
Term
Clarity Characteristics
Definition
the collective term for inclusions and blemishes
Term
Crown
Definition
top part of the gem above the girdle
Term
Culet
Definition
small facet at the bottom of a finished gem
Term
Durability
Definition
a gemstone's ability to withstand wear, heat, and chemicals
Term
Facet
Definition
a flat, polished surface on a finished gem
Term
Fancy Cut
Definition
any gemstone shape other than round
Term
Fire
Definition
the flashes of color you see in a polished diamond
Term
Four Cs
Definition
four value factors (clarity, color, cut, and carat weight) that describe the quality of a finished diamond
Term
Gem Quality
Definition
rough gem material that requires normal processing to produce a polished gem suitable for use in jewelry
Term
Girdle
Definition
the narrow section of a finished gem that forms the boundary between the crown and the pavilion and functions as the gem's setting edge
Term
Hardness
Definition
how well a gemstone resists scratches and abrasion
Term
Inclusion
Definition
clarity characteristic totally enclosed in a polished gemstone or extending into it from the surface
Term
Industrial Quality
Definition
rough gem material suitable for use in tools, drills, abrasives, and other industrial applications
Term
Karat
Definition
a unit of measure for the fineness of gold, abbreviated "K" or "Kt"
Term
Metric Carat
Definition

the international unit of measurement for gem weight

 

one carat=1/5 of a gram (0.200 g)

Term
Mixed Cut
Definition
cut that combines brilliant-cut and step-cut styles
Term
Mohs Scale
Definition

ranking of the relative hardness of 10 minerals

 

1-talc, 2-gypsum, 3-calcite, 4-fluorite, 5-apatite, 6-orthoclase feldspar, 7-quartz, 8-topaz, 9-corundum, 10-diamond

Term
Near-gem Quality
Definition
rough gem material that requires substantially more processing than gem-quality rough to produce a polished gem suitable for use in jewelry
Term
Pavilion
Definition
lower part of a faceted gem below the girdle
Term
Point
Definition
one hundredth of a carat (0.01 ct)
Term
Scintillation
Definition
the flashes of light you see when the diamond, the light, or the observer moves
Term
Simulant
Definition
a natural or man-made material that resembles a gem (also called imitation)
Term
Single Cut
Definition
a round stone with 17 or 18 facets
Term
Stability
Definition
how well a diamond resists chemicals and temperature changes
Term
Standard Round Brilliant
Definition
a round brilliant-cut stone with 57 or 58 facets; often called a full cut
Term
Step Cut
Definition
a cutting style that features long, narrow facets in rows (usually three) parallel to the girdle on both the crown and the pavilion
Term
Synthetic Gem
Definition
a man-made gem with essentially the same chemical composition, crystal structure, and properties as a natural gem
Term
Thermal Shock
Definition
damage caused by sudden, extreme temperature changes
Term
Toughness
Definition
how well a gemstone resists breaking and chipping
Term
Value Factors
Definition
features used to judge the quality and value of all gemstones
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