Definition 1 of 116
Written description of a material's chemical makeup.
CHEMICAL COMPOSITIONS
CRYSTAL STRUCTURE
CHEMICAL FORMULA
HARDNESS
Definition 2 of 116
A smooth, flat break in a gemstone parallel to planes of atomic weakness.
HARDNESS
LUSTER
CLEAVAGE
FRACTURE
Definition 3 of 116
A process in which nutrients dissolve in heated chemicals and then cool to form synthetic
crystals.
SOURCE
PULLING
COLOR ZONING
FLUX
,Definition 4 of 116
Once living, or produced by a living organism (plant or animal).
CLASTIC
CRYSTAL STRUCTURE
MINERALS
ORGANIC
Definition 5 of 116
The quality of the polish and precision of the cut of a fashioned gemstone.
LUSTER
FINISH
CLARITY
STYLE
Definition 6 of 116
The study of gems.
GENEALOGY
FORLORN
GEMOLOGY
GAMESOME
Definition 7 of 116
Any break in a gem other than cleavage or parting.
LUSTER
CLEAVAGE
FRACTURE
HARDNESS
,Definition 8 of 116
A gemstone's relative freedom from inclusions and blemishes.
TRANSPARENCY
LUSTER
CLARITY
HARDNESS
Definition 9 of 116
A family of gems from several closely related mineral species.
LAYERS
SPECIES
GROUPS
METALS
Definition 10 of 116
How well a gemstone resists breaking, chipping, and cracking.
TOUGHNESS
STABILITY
DURABILITY
HARDNESS
Definition 11 of 116
The arrangement of a stone's facets.
STYLE
STAMEN
FINISH
ANTHER
, Definition 12 of 116
Areas of different color in a gem, caused by variations in growth conditions.
FLUORESCENCE
COLOR ZONING
COLOR CENTER
COLOR RANGE
Definition 13 of 116
Any material that looks like a natural gem and is used in its place.
LUSTER
IMITATION GEMS
NATURAL GEMS
COLORLESS IMPREGNATION
Definition 14 of 116
Characteristic or irregularity confined to the surface of a polished gemstone.
INCLUSION
BLEMISH
ABRASIONS
FRACTURE
Definition 15 of 116
Exposing a gem to rising temperatures for the purpose of changing its appearance.
SMOKE TREATMENT
HEAT TREATMENT
FRACTURE FILLING
CRYSTAL GROWTH
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