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Uvarovite With Chromian Diopside & Cobaltpentlandite

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CLB157710

Uvarovite With Chromian Diopside & Cobaltpentlandite

ex collection Aidara-Hühne
Type Locality

Description Tabs

Description
Locality: 
Outokumpu, North Karelia, Finland
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.9 × 3.7 × 3.6 cm
Largest Crystal: 
2.00cm
Description

I had a green lump with a little uvarovite edge looking out of the matrix for many years in my collection. Just a few weeks ago I had the bright idea to have the specimen trimmed, just so that the '3 mm'-crystal would be more present. That's what I got: a fantastic specimen, full of giant, twinned and intergrown uvarovite crystals (I count at least a dozen) up to 2.0 cm. As an extra on top I got a little minor chromian diopside and golden yellow cobaltpendlandite (type locality) in the matrix. Not all of the garnet crystals are perfect, but look at the enormous (for uvarovite) size and the beautiful dark green color (much better in nature).Sometimes you've got to be lucky ...

Mineral Data
What's on the rock

Uvarovite

Formula: 
Ca3Cr2(SiO4)3
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Saranovskii Mine (Saranovskoe), Saranovskaya Village (Sarany), Gornozavodskii area, Permskaya Oblast', Middle Urals, Urals Region, Russia...

Chromian Diopside

Variety Of: 

Diopside

Formula: 
CaMgSi2O6
Strunz: 
9.DA.15
Hardness: 
5.5 - 6.5
Formula: 
(Ca,Cr)MgSi2O6
Hardness: 
0.0
Colour: 
Green

Cobaltpentlandite

Formula: 
(Co,Ni,Fe)9S8
Strunz: 
2.BB.15
Crystal System: 
Isometric
Hardness: 
4.0 - 4.5
Colour: 
Yellow
Type Locality: 
Varislahti deposit, Outokumpu Cu-Co-Zn-Ni-Ag-Au ore field, Eastern Finland Region, Finland

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