Original Message: Specific gravity liquid |
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The old jewelers of my acquaintance used a 3.0 specific gravity liquid to distinguish jade and nephrite from serpentines such as "Suchow jade" (which is what your third sample looks like to me). http://link.springer.com/chapter/10.1007/978-1-4684-6572-3_3#page-1 All rights reserved by Bead Collector Network and its users |
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