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Nepheline With Melilite

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QRI857291

Nepheline With Melilite

Former collection Christian Mavris

Description Tabs

Description
Locality: 
Osa Quarry, Osteria dell'Osa, Rome Province, Lazio, Italy
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
15 × 11.7 × 5.7 cm
Largest Crystal: 
0.40cm
Weight: 
1 220.00gr
Description

A monster drusy featuring hundreds of blocky nepheline crystals of good lustre, intimately associated to each other. Most crystals are in very good conditions, and occasionally some brown needles of melilite can be spotted.
The specimen is truly rich, and it is easy to spot in between also some dark pyroxenes. Associated, there might be gismondine and some phillipsite too.

Cava dell'Osa used to be a classic locality near Rome, and now this level is defunct. The specimen is over 30 years old, and this is possibly one of the very best I have ever had.

Mineral Data
What's on the rock

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

Melilite

Group Parent: 
Melilite Group

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