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Eudidymite & Zircon On Quartz

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PDM652132

Eudidymite & Zircon On Quartz

Description Tabs

Description
Locality: 
Mount Malosa, Zomba, Southern Region, Malawi
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 1.9 × 1.2 cm
Largest Crystal: 
1.70cm
Description

White parallelly grown crystals of eudidymite, a very rare species but not uncommon at Mount Malosa, on a floater group of transparent crystallized quartz, richly coated by brown crystals of zircon.

Specimen #3236 of the Tom Hermes collection.

Mineral Data
What's on the rock

Eudidymite

Formula: 
Na2Be2Si6O15·H2O
Strunz: 
9.DG.60
Hardness: 
6.0
Type Locality: 
Eudidymite locality, Lille Arøya (Midtre Arøy; Øvre Arøy; Övre-Arö), Langesundsfjorden, Larvik, Vestfold, Norway

Zircon

Formula: 
ZrSiO4
Strunz: 
9.AD.30
Crystal System: 
Tetragonal
Hardness: 
7.5
Streak: 
White

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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