Smoky Citrine Crystal This mineral is rare on

This mineral is rare on Earth but extremely common in space as it is makes up a large percentage of stardust

This amethyst free form has a very interesting shape

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Agate specimens are commonly dyed unnatural colors such as blue

The world believed Metasequoia glyptostroboides was an extinct species until its rediscovery in a secluded area of China in 1944

Smoky Citrine Crystal This mineral is rare onSize: 1. 3 in. Weight: 0. 85 oz Citrine is a variety of quartz. It gets its name from the Latin word "citron". The color of citrine is not fully understood. Some citrine is colored from aluminum based centers and irradiation. This is similar to smoky quartz. More common, commercial grade citrine is often amethyst that has been heated to extreme temperatures, essentially baking it to the proper color. This is citrine by scientific standards. Citrine is