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