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Hydroxylapatite On Hornblende

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PDM811978

Hydroxylapatite On Hornblende

Classic Locality

Description Tabs

Description
Locality: 
Oksøyekollen, Snarum, Modum, Viken, Norway
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 2.6 × 2 cm
Largest Crystal: 
2.50cm
Description

Ivory-white perfect crystal that is completely crystallized all around and associated to a green prismatic crystal of hornblende. A damage-free hydroxyapatite crystal from this classic locality.

Acquired by J.Sibtsen in 1975-77. Ex Jan Sibtsen #1674.

Mineral Data
What's on the rock

Hydroxylapatite

Formula: 
Ca5(PO4)3(OH)
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
5.0
Streak: 
White

Hornblende

Synonym Of: 

Ferro-hornblende

Formula: 
☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0

Magnesio-hornblende

Formula: 
☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0

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