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Cut crystals of blue tanzanite

Cut crystals of blue tanzanite

E425/0458

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Credit

VAUGHAN FLEMING / SCIENCE PHOTO LIBRARY VAUGHAN FLEMING / SCIENCE PHOTO LIBRARY

Caption

Cut crystals of tanzanite, a blue variety of zoisite (hydrous calcium aluminium silicate) which contains impurities of chromium and strontium. Various shades of smokey-blue and vilolet-blue are seen here. Zoisite occurs in a variety of other colours including white, pale green and pink. Tanzanite is found only in Tanga province, Tanzania, and is considered an important gemstone.

Release details

Model release not required. Property release not required.

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