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4 x 4 x 5cm Agate is a translucent form of microcrystalline quartz. These crystals form inside of igneous rocks over a long period of time and get their banding from years of siliceous groundwater building up in the cavities of these rocks. What makes this mineral so beautiful and unique is that the color variations and banding patterns are completely dependent on the environmental factors around them. This makes it so that every formation is different and there are no two formations that are the same! ***Due to natural variations in stones, the appearance will vary***
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8 x 8 x 9cm Calcite is a mineral when originally formed is colorless and opaque and can come in many different forms of translucency. It gets its beautiful colors and banding from impurities in the rocks the specimen is formed in. Calcite gets its name from the water within the mineral being rich in calcium. This soft mineral can be found all over the world; mainly in shallow marine settings such as hydrothermal veins and hot spring deposits. Many marine life species, such as crabs and coral, rely on calcite to form their shells. ***Due to natural variations in stones, the appearance will vary***
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