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Amethyst — specimen 0683, photo © NMNHS
Amethyst — specimen 0683, photo © NMNHS

Amethyst — specimen 0683

Origin

South America
Brazil
Amethyst — specimen 0683, locality map
Data

Weight: 1.53 ct; size: 9.20 | 7.79 | 5.33 mm; shape: oval; colour: medium dark bluish violet; very slightly greyish; clarity: eye clean; cut: excellent; treatment: none.
Notes

Very clean specimen; design ‘Ovalimixtum’ [second crown angle changed to 28.00], 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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