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Monazite-(Ce) & Sillimanite

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SER831309

Monazite-(Ce) & Sillimanite

Description Tabs

Description
Locality: 
Nibbio-Val Faera, Mergozzo, Verbano-Cusio-Ossola Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 2.2 × 2.2 cm
Description

a large, yellow monazite-Ce crystals in pegmatite matrix with a grey crystal of sillimanite 

Mineral Data
What's on the rock

Monazite-(Ce)

Formula: 
(Ce,La,Nd,Th)(PO4)
Strunz: 
8.AD.50
Hardness: 
5.0 - 5.5
Type Locality: 
Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...

Sillimanite

Formula: 
Al2(SiO4)O
Strunz: 
9.AF.05
Crystal System: 
Orthorhombic
Hardness: 
6.5 - 7.5
Streak: 
white
Type Locality: 
Chester, Middlesex Co., Connecticut, USA