11.3 Gr All Natural Green Prehnite Orb

Category Collectibles Rocks, Fossils & Minerals Crystals & Mineral Specimens Display Specimens

Current price $5.99

Listing type Fixed Price Item

Location Arkansas US

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Quantity available 1

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Seller shinyplunder (658)

Seller rating 99.5% positive feedback

Modified Item No

Country/Region Of Manufacture United States

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11.3 Gr All Natural Green Prehnite Orb
DIMENSIONS: 20.4 MM X 20.3 MM X 17.4 MM
You will receive the exact orb photographed above ^
Item # 1476
FYI: Prehnite is an inosilicate of calcium and aluminium with the formula: Ca2Al(AlSi3O10)(OH)2. Limited Fe3+ substitutes for aluminium in the structure. Its hardness is 6-6.5, its specific gravity is 2.80-2.90 and its color varies from light green to yellow, but also colorless, blue, pink or white. It was first described in 1788 for an occurrence in the Karoo dolerites of Cradock, Eastern Cape Province, South Africa. It was named for Colonel Hendrik Von Prehn (1733–1785), commander of the military forces of the Dutch colony at the Cape of Good Hope from 1768 to 1780.

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