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468 search results for: brown crystals

26

Crystal variety classification

Depending on the color and special optical effects, the crystals can be divided into different gemstone varieties. (1) Colorless crystal: colorless and transparent, the composition is pure, transparent, no inclusions […]

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Kakortokite

Kakortokite is a rare igneous rock primarily composed of perthitic microcline feldspar with minor amounts of other minerals such as nepheline, sodalite, and/or eudialyte. It typically forms in alkaline intrusions, […]

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Septarian

Septarian, also known as Septarian Nodule or Dragon Stone, is a distinctive type of sedimentary rock that is characterized by its unique, striking appearance. It is composed primarily of a […]