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or absent while the premolars and molars have become flattened. The points also form a half-moon shape.....more
及硫鹽斑銅礦BorniteSulfides and SulfosaltsBornite is rarely seen in the form of single crystal, usually.....more
Idocrase是源自希臘語,為「形狀(Form)」和「混合(Mixing)」的意思,因為它的晶體型態,看似其它礦物的晶形混和而成。而此種礦物也因產在義大利維蘇威Monte Somma附近,所以又稱為維蘇威石.....more
. Pure form is a transparent crystal; multicolor is presented when containing other trace elements.....more
. It is not easy for sulfur to maintain its form on the surface of the earth; it often reacts with every kind.....more