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Amethyst
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Amethyst — specimen 0612, photo © NMNHS
Amethyst
—
specimen 0612
Origin
South America
Uruguay, Artigas Department
Data
Weight:
0.91 ct;
size:
6.75 | 6.64 | 4.44 mm;
shape:
round;
colour:
medium violetish blue; very slightly greyish;
clarity:
eye clean;
cut:
excellent;
treatment:
none.
Notes
Very clean specimen; excellent brilliant style cut. Source: Jeffery Davies,
Jeffery Davies Fine Jewelry & Gemstones
.
Other specimens
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More information from ‘Classification’
Amethyst
A violet variety of quartz. The colour is caused by iron impurities in the 10s to 100s parts per million range.
Gemmology — gemstones
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