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Ametrine — specimen 0397, photo © NMNHS
Ametrine — specimen 0397, photo © NMNHS

Ametrinespecimen 0397


South America
Bolivia, Santa Cruz Department, Ángel Sandoval Province, La Gaiba, Anahí mine, 17.25°S 58.821°W
Ametrine — specimen 0397, locality map

Weight: 8.79 ct; size: 11.83 | 11.60 | 7.88 mm; shape: octagon; colour: light bluish violet; strong; clarity: slightly included; cut: fair; treatment: none.

Clean specimen; step style cut with large window.

Other specimens
Ametrine — specimen 0226Ametrine — specimen 0102Ametrine — specimen 0128Ametrine — specimen 0208Ametrine — specimen 0299

More information from ‘Classification’

A variety of quartz. Ametrine crystals are made of alternating sectors of violet and yellow to orange colour. While the violet sectors are made of amethyst, the yellow or orange sectors are not made of citrine, because they are coloured by inclusions of iron compounds. Upon heating ametrine the violet sectors pale, while the yellow-orange ones keep their colour.