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Actinolite Psm Diopside

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GFM625302

Actinolite Psm Diopside

Rare Mineral

Description Tabs

Description
Locality: 
Jumbo Mine, Prince of Wales Island, Alaska, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.5 × 3 × 1.5 cm
Description

"Pseudomorph from actinolite after diopside crystals (uralite)". Very nice crystal clusters of dark green well-terminated long prismatic "crystals". Very nice old-time specimens collected around 1920

Mineral Data
What's on the rock

Actinolite

Formula: 
☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Strunz: 
9.DE.10
Crystal System: 
Monoclinic - Prismatic
Hardness: 
5.0 - 6.0
Streak: 
White

Diopside

Formula: 
CaMgSi2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.15
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.5
Streak: 
white
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