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Dimensions: 6x4x1
This interference phenomenon is due to reflection and refraction on extremely thin parallel Brazil-law twinning lamellae or periodic etching of defects on z faces
well-formed crystals with strong aesthetic appeal
ruby contributes to the red coloration
It is a very common mineral that occurs throughout the world and is the only mineral that large quantities of elemental fluorine can be extracted from
Carbon Included Enhydro from Tibet TF3278 blue opal Dimensions: 6x4x1Carbon Included Enhydro from Tibet Approx. Dimensions: 2. 75x1. 75x1. 25 inches Approx. Weight: 116. 4 grams Locality: Tibet This is a completely natural double terminated crystal from Tibet (no polishing has been done). Carbon is included in this quartz piece in several places, but most notably in a pocket with a fluid inclusion. This causes the carbon particles to cascade up and down the cavity. The cavity is circled with black Sharpie, which can be
