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Tweddillite

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SKY617099

Tweddillite

Type Locality

Description Tabs

Description
Locality: 
Wessels Mine, Hotazel, Kalahari, Northern Cape Province, South Africa
Class: 
Crystal Group/Cluster
Size Range: 
Micromount (under 1cm)
Size: 
0.1 × 0.1 × 0.1 cm
Description

Very small but perfect sharp crystal group of the extremely rare mineral tweddillite from the type locality in Wessels mine.

Tweddillite is one of the rarest minerals from Wessels mine and it is very rarely seen in the systematic mineral market.

Mineral Data
What's on the rock

Tweddillite

Formula: 
{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
Group Parent: 
Epidote Supergroup
Strunz: 
8/C.23-45
Crystal System: 
Monoclinic
Hardness: 
6 - 7
Colour: 
Deep red
Streak: 
Brownish red
Type Locality: 
Wessels Mine, North Cape Province, South Africa

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