Gemmology
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Amethyst — specimen 0612, photo © NMNHS
Amethyst — specimen 0612, photo © NMNHS

Amethystspecimen 0612

Origin

South America
Uruguay
Amethyst — specimen 0612, locality map
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
Amethyst — specimen 0675Amethyst — specimen 0676Amethyst — specimen 0678Amethyst — specimen 0679Amethyst — specimen 0681Amethyst — specimen 0703Amethyst — specimen 0706Amethyst — specimen 0467Amethyst — specimen 0085Amethyst — specimen 0344Amethyst — specimen 0402Amethyst — specimen 0224Amethyst — specimen 0368Amethyst — specimen 0091Amethyst — specimen 0193Amethyst — specimen 0199Amethyst — specimen 0232Amethyst — specimen 0169

More information from ‘Classification’


A violet variety of quartz. The colour is caused by iron impurities in the 10s to 100s parts per million range.