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Melilite Hydroxylapatite & Nepheline

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MNR558452

Melilite Hydroxylapatite & Nepheline

Description Tabs

Description
Locality: 
Campos de Calatrava, Ciudad Real, Castilla La Mancha, Spain
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 3.7 × 2.3 cm
Description

Melilite creates yellow-brown crystals with white nepheline crystals and acicular hydroxylapatite crystals on basalt matrix.

 

Mineral Data
What's on the rock

Melilite

Group Parent: 
Melilite Group

Hydroxylapatite

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

Nepheline

Formula: 
(Na,K)AlSiO4
Strunz: 
9.FA.05
Hardness: 
5.5 - 6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy