Item Information

Dimensions (mm) not provided
Weight (carats) not provided
Certified Gemstone


This is a natural untreated specimen from Yunnan prov China.

Weight 160.50 cts app

Size 51 x 37 x 16 mm app

Hemimorphite, is a sorosilicate mineral which has been mined from days of old from the upper parts of zinc and lead ores, chiefly associated with smithsonite. It was often assumed to be the same mineral and both were classed under the same name of calamine. In the second half of the 18th century it was discovered that there were two different minerals under the heading of calamine - a zinc carbonate and a zinc silicate, which often closely resembled each other.

The silicate was the more rare of the two, and was named hemimorphite because of the hemimorph development of its crystals. This unusual form, which is typical of only a few minerals, means that the crystals are terminated by dissimilar faces. Hemimorphite most commonly forms crystalline crusts and layers, also massive, granular, rounded and reniform aggregates, concentrically striated, or finely needle-shaped, fibrous or stalactitic.

2d 11h 44m 10s

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Pricing & Details

Bid Increment $1.00
Starting Bid $57.00
Auction ID 177727
Watchers 5 watching
Viewed 475 times
Starts 25th Oct 2016 8:02pm PDT
Ends 28th Oct 2016 8:00pm PDT

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