A popular opaque gemstone, it comes in diverse colors like blush, coral, cream, and baby pink. The most valuable variety is a pale pink, also known as ‘peppermint candy stone.’ Palygorskite and chalcedony are found in pink opals, a natural gemstone type. In contrast to white chalcedony, a microcrystalline quartz mineral, palygorskite is an opal-like phyllosilicate. The water content of these opals, which makes up 6–10% of the gem, is in addition to their silica content.
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