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Amethyst — specimen 0218, photo © NMNHS
Amethyst — specimen 0218, photo © NMNHS

Amethyst — specimen 0218

Origin

South America
Brazil
Amethyst — specimen 0218, locality map
Data

Weight: 5.08 ct; size: 12.53 | 8.38 | 8.06 mm; shape: octagon; colour: light bluish violet; very slightly greyish; clarity: eye clean; cut: excellent; treatment: none.
Notes

Very clean specimen; angles [skipping after 45 in the crown] as in ‘Opposing Corners 15’ by Robert H. Long, excellent cut by Tan Pen.

Other specimens
Amethyst — specimen 0675Amethyst — specimen 0676Amethyst — specimen 0678Amethyst — specimen 0679Amethyst — specimen 0681Amethyst — specimen 0703Amethyst — specimen 0706Amethyst — specimen 0467Amethyst — specimen 0753Amethyst — specimen 0085Amethyst — specimen 0612Amethyst — specimen 0344Amethyst — specimen 0402Amethyst — specimen 0224Amethyst — specimen 0368Amethyst — specimen 0091Amethyst — specimen 0193Amethyst — specimen 0199

More specimens

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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