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Gem Refractometer Gemological GEMSTONE Built-in LED Light Source RI Oil Black

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Price:
$98.99
Free shipping
Estimated delivery Fri, May 10 - Wed, May 29
Returns:
30 days returns. Buyer pays for return shipping.
Condition:
New
The refractive index (RI) of a gemstone provides the single most important piece of information to a gemologist seeking to identify an unknown stone. Due to its chemical composition and crystallization structure, each gem has a typical refractive index.