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Agate comes in a wide variety of colours which is primarily formed within volcanic and metamorphic rocks.

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A Feldspar mineral that forms in short prismatic, tabular crystals or masses. It ranges in hue from bright verdigris green to paler shades of turquoise, sometimes with white, yellow, or grey portions, and can be translucent to opaque.

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composition and colour of amber is determined by many factors, such as the origin of amber, the sediments in which the amber has been deposited, the local climate, the formation of the near surroundings and the temperature in the ground.