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K9 glass [synthetics]
K9 glass [synthetics] — specimen S-008, photo © NMNHS
K9 glass [synthetics]
—
specimen S-008
Data
Weight:
90.97 ct;
size:
30.51 | 30.50 | 20.68 mm;
shape:
round;
colour:
medium green-blue or blue-green; very slightly greyish;
clarity:
eye clean;
cut:
good.
Notes
Big, very clean specimen; commercial cut; good polish.
More information from ‘Classification’
K9 glass [synthetics]
A Chinese optically clear borosilicate glass; contains 9% of lead.
Gemmology — gemstones
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