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Vesuvianite & Adularia

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PJM83812

Vesuvianite & Adularia

Ex J & S Mommers Collection

Description Tabs

Description
Locality: 
Brandberg, Dâures, Erongo Region, Namibia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.9 × 3 cm
Largest Crystal: 
4.00cm
Description

A row of parallel growing vesuvianite crystals to 3.6cm are contrasted by a small cluster of white adularia crystals at the front base of this more unusual species from Erongo.

Mineral Data
What's on the rock

Vesuvianite

Formula: 
(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Strunz: 
9.BG.35
Hardness: 
6.5
Streak: 
White
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Adularia

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Monoclinic
Hardness: 
6 Ortho - clase
Earthstones Australia

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