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Colored Stones 1
Introduction
14
Other
Post-Graduate
05/10/2018

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Term
Inorganic
Definition
composed of, or arising from, non-living matter
Term
Organic
Definition
produced by, or derived from a living organism
Term
Natural Gems
Definition
gems produced by natural processes, without human help
Term
Atom
Definition
the basic structural unit of all matter and the smallest unit that retains the characteristics of a chemical element
Term
Chemical Element
Definition
a substance that consists of atoms of only one kind
Term
Chemical Composition
Definition
the kinds and relative quantities of atoms that make up a material
Term
Mineral
Definition
a natural, inorganic substance with a characteristic chemical composition and structure
Term
Rock
Definition
a natural material composed of masses of mineral crystals of one or more kinds
Term
Silicate
Definition
a mineral that contains silicon and oxygen
Term
Crystal Structure
Definition
the regular, repeating internal arrangement of atoms in a material
Term
Amorphous
Definition
lacking a regular crystal structure
Term
Gem Species
Definition
a broad gem category based on chemical composition and crystal structure
Term
Gem Variety
Definition
a subcategory of species, based on color, transparency, or phenomenon
Term
Group
Definition
a family of gems from several closely related mineral species
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