Abstract: Opal Spheres
Opal is a hydrated amorphous form of silica; its water content may range from 3% to 21% by weight, but is usually between 6% to 10%. Because of its amorphous character it is classed as a mineraloid, unlike the other crystalline forms of silica which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl and basalt. (Wikipedia.org)
Abstract: Opal Spheres
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Abstract: Opal Spheres

Super close-ups of opals. Being their own little worlds...
5
179
2
Published:

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