Refractive index
A measure of how much a gem bends light, used in identification. Diaspore's species range is about 1.682–1.752; gem-cut material clusters around 1.70–1.75.
A measure of how much a gem bends light, used in identification. Diaspore's species range is about 1.682–1.752; gem-cut material clusters around 1.70–1.75.
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