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It is formed when silica-rich water fills cavities in rocks and deposits layers of chalcedony
In daylight
and the size is 75 x 40 x 35 mm
Cassiterite Crystals on Cleavelandite Matrix Blue stones new items added dailyBeautiful cassiterite crystals on a matrix of cleavelandite albite. Cassiterite is a tin oxide mineral that is often found in association with cleavelandite, a platy variety of albite. Cleavelandite is a common constituent of pegmatites, where it forms warped masses of mineral with lamellae parallel to (010) and may be twinned on the albite law. Cassiterite crystals on cleavelandite are rare and highly sought after by mineral collectors. They exhibit
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