Tuesday, 4 March 2008

Mineral Spot: Aragonite...

Aragonite is the orthorhombic form of calcium carbonate, with the most common form, calcite, having a trigonal crystal symmetry. Crystals such as the ones in the photo commonly occur in cavities in basalt rocks. This specimen is from a basalt quarry at Learmonth near Ballarat, Victoria.

It is also a specimen that will be included in one of my auction lots next week at OZtion...

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