A simulation of a gemstone that is made of two or three layers of gemstone or glass that are cemented or fused together so as to appear as a whole natural stone.The purpose is to provide a more attractive colour or a protective top surface (as for an opal).They can be distinguished from genuine stones by several tests:by revealing a ring around the gridle, especially when immersed in water or certain liquids and then viewed from the sideby having different specific gravityby microscopic examinationby immersion in hot water or an organic solvent which will soften the cement and separate the layersSuch stones are sometimes called an 'assembled stone'.
Composite Stone
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Explanation on composite stone by Adin antique jewelry
Adin Academy
Composite Stone
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A simulation of a gemstone that is made of two or three layers of gemstone or glass that are cemented or fused together so as to appear as a whole natural stone.The purpose is to provide a more attractive colour or a protective top surface (as for an opal).They can be distinguished from genuine stones by several tests:by revealing a ring around the gridle, especially when immersed in water or certain liquids and then viewed from the sideby having different specific gravityby microscopic examinationby immersion in hot water or an organic solvent which will soften the cement and separate the layersSuch stones are sometimes called an 'assembled stone'.
Also known as:
References
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson
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