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Prehnite

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QRI785830

Prehnite

Former collection Christian Mavris
Classic Locality

Description Tabs

Description
Locality: 
Rossena, Canossa, Reggio Emilia Province, Emilia-Romagna, Italy
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.4 × 6.7 × 6.1 cm
Weight: 
285.00gr
Description

Sculptural specimen of crystallized prehnite of white-green color in this rather large vein, extracted from a pillow lava matrix. Prehnite is quite lustrous and of good quality, and its distinct feature is the stalactite protruding from the main drusy, which is mostly complete and with yellow-green color.

Besides the sculptural character of the specimen, this prehnite is a true rarity. The area of Rossena-Campotrera is part of a national reservation and collection is off-limits since over 15 years, thus making any find pretty much impossible nowadays.

Former collection Giannobbi (I), in my personal collection since 2005 (I was a geology undergrad back then). The specimen was part of a much larger matrix, carefully trimmed more recently. Only a couple of minor contacts on the outer parts of the specimen.

Mineral Data
What's on the rock

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa

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