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Amethyst
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Amethyst — specimen 0703, photo © NMNHS
Amethyst
—
specimen 0703
Origin
no locality data
Data
Weight:
0.57 ct;
size:
6.37 | 5.56 | 3.39 mm;
shape:
hexagon;
colour:
light violetish blue; strong;
clarity:
eye clean;
cut:
excellent;
treatment:
none.
Notes
Very clean specimen; design ‘Hexamixtum S 41-32’, excellent cut by Tan Pen.
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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