![](http://www.alamy.com/thumbs/6/570E9C39-CC7A-4BFD-B170-26FD29C6F278/F01PTG.jpg)
Amethysts, silicates.
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Photo credit: © De Agostini Picture Library / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: amethysts, background, black, close-, condition, crystal, gem, geology, holder, horizontal, life, metamorphic, mineral, natural, nature, object, pattern, people, power, rock, rough, sample, science, scientific, shot, silica, silicates, single, specimen, stone, studio, textured, toughness