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Haüyne Monazite-(Ce) Hyalite & Sanidine

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CLB608858

Haüyne Monazite-(Ce) Hyalite & Sanidine

Classic Locality

Description Tabs

Description
Locality: 
In den Dellen Quarries, Niedermendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.8 × 6 × 4 cm
Description

Deep blue haüyne grains and crystals (rather big crystal with smooth surfaces hidden a bit in a vug) with orange-brown monazite-Ce (visual ID, maybe titanite, but not likely), greenish hyalite (opal-an), colorless sanidine and a few unidentified mineral species. One of the better specimen I had so far.

Mineral Data
What's on the rock

Haüyne

Formula: 
(Na,Ca)4-8(Al6Si6O24)(SO4,S,Cl)1-2
Strunz: 
9.FB.10
Hardness: 
5.5 - 6.0
Type Locality: 
Lake Nemi, Alban Hills, Rome Province, Latium, Italy

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...

Hyalite

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Streak: 
white

Sanidine

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Monoclinic - Prismatic
Hardness: 
6.0
Streak: 
White
Type Locality: 
Drachenfels, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany

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