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Corundum [synthetics]
Corundum [synthetics] — specimen S-004, photo © NMNHS
Corundum [synthetics]
—
specimen S-004
Data
Weight:
6.29 ct;
size:
14.87 | 7.90 | 4.94 mm;
shape:
cushion;
colour:
medium light purple; very slightly greyish;
clarity:
eye clean;
cut:
good.
Notes
Very clean specimen; commercial cut; good polish.
More information from ‘Classification’
Corundum [synthetics]
Manufactured mainly using the Verneuil process, also called flame fusion, developed by the French chemist Auguste Verneuil.
Gemmology — gemstones
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