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Definition
| materials that have been formed by nature and without human interference or modification other than fashioning |
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| those that have been manufactured and which are not, therefore, formed naturally |
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| artificial gem materials, produced in the laboratory or factory, that possess the same composition, structure and physical properties as a natural, inorganic mineral counterpart |
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| natural or artificial materials that are used to imitate the effect, color and appearance of other gem materials without possessing their chemical and physical properties |
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| those assembled artificially from two or more natural or artificial components in such a way as to give the impression of a single item |
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| artificial products made by bonding or fusing materials to form a single gem material |
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| production of synthetic gem-quality crystals whereby material is melted to form a single mass of crystalline solid |
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| production of synthetic gem-quality crystals whereby hot, molten fluid (a flux) is sued to dissolve gem-producing materials which, on cooling, recrystallize to form the desired gem material |
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Term
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| production of synthetic gem-quality crystals whereby the ingredients are placed in water in a sealed container adn heated; the resultant high pressure causes the liquid to dissolve the ingredients which then recrystallize onto 'seed plates' in cooler parts of the vessel |
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Term
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Definition
| a method of gemstone synthesis whereby a fine powder of the appropriate composition falls through a very hot oxy-hydrogen flame, is melted and then solidifies as a single crystal |
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