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Prehnite (63x40 cm) Europe's largest.
Found in May 2024 from the famous "Minbalman mines in Mibladen", where a small pocket of prehnite was discovered in 1976! The period from February to August yielded approximately 1600 kg of prehnite, which included this 87 kg chunk! (And in Morocco there is still a piece of 130 kg covered with exquisite rosettes of calcite, which was sold to the geological museum in Casablanca!
Availability:
In stock
SKU
122270
The mineral prehnite is a calcium-aluminium silicate. The mineral belongs to the phyllosilicates. The transparent to translucent colourless, white, grey or yellow to yellow-green prehnite has a glassy to pearly lustre and a white streak colour. Prehnite has an average density of 2.87, and the hardness is 6 to 6.5. The crystal system is orthorhombic, and the mineral is not radioactive. The mineral prehnite is named after the Dutch Colonel Hendrik Von Prehn (1733 - 1785), who discovered the mineral in South Africa. Prehnite was the first mineral to be named after a person. Although it is not a zeolite, it is often found near zeolites. Granites, syenites, and gneisses, among other places, contain it. It is also an indicative mineral for the low-grade metamorphic facies prehnite-pumpellyite. The type locality is Haslach, Harzburg and Oberstein, Germany.
| Dimensions | 63x40cm |
|---|---|
| Country of Manufacture | Morocco |
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