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Opal

Opal

C039/4770

Rights Managed

60.2 MB (3.6 MB compressed)

5616 x 3744 pixels

47.5 x 31.8 cm ⏐ 18.7 x 12.5 in (300dpi)

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Credit

DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY

Caption

Opal is an amorphous hydrated silicon oxide, chemical formula Si02.nH20. It is precipitated from silica-bearing waters in voids and fissures of certain rocks. Water molecules trapped in the silica framework account for the milky lustre and brilliant pastel colours that make opal such a desirable precious stone. Specimen is from Opal Butte, Oregon, USA and actual width is 75 mm.

Release details

Model release not required. Property release not required.

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