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Agate is also a kind of agate. It is a kind of mineral chalcedony. It is usually striped with Opal and mysterious quartz. The hardness is 6.5-7 degrees, the ratio is 2.65, and the color is quite different. Translucent or opaque. The first form is the three - party crystal system. They are usually dense and massive, forming various structures, such as grapes and nodules. Different colors of chalcedony, usually red, yellow, green, white and other colors