ggeology: Opal MasterpostOpals are not actually minerals. They are an amorphous form of silica. Unlike other forms of silica that are classified as minerals, Opals lack crystalline structure and are therefore referred to as “mineraloids”. They are
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ggeology: Opal MasterpostOpals are not actually minerals. They are an amorphous form of silica. Unlike other forms of silica that are classified as minerals, Opals lack crystalline structure and are therefore referred to as “mineraloids”. They are
