Hi to all, on the forum I found an useful document on how to measure the weight in carats of a mounted stone. There is a list of different shapes of gems, but the part I don't understand is the therm S.G.
this is an example:
Round faceted stones: Diameter squared x depth x S.G. x .0018 = carat wt.
Joined: Sun Oct 04, 2009 11:18 am Posts: 595 Location: Madrid, Spain
Davide, for small mounted diamonds it's much more accurate to use micrometer loupe + tables or formulas to convert measurements to carat weight. For example this model.
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