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Mosandrite & Eudialyte

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CFL912587

Mosandrite & Eudialyte

Description Tabs

Description
Locality: 
Arøyskjærene, Langesundsfjorden, Larvik, Vestfold og Telemark, Norway
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 6 × 3 cm
Description

Typical specimen of black mosandrite-(Ce) crystals associated with dark red eudyalite.  Ex-Horvath Collection specimen.

Mineral Data
What's on the rock

Mosandrite

Formula: 
(◻,Ca,Na)3(Ca,REE)4Ti(Si2O7)2[H2O,OH,F]4·H2O
Strunz: 
9.BE.20
Hardness: 
4.0
Type Locality: 
Låven (Skådön; Lamö; Lamanskjaer), Langesundsfjorden, Larvik, Vestfold, Norway

Eudialyte

Formula: 
Na15Ca6(Fe2+,Mn2+)3Zr3[Si25O73](O,OH,H2O)3(OH,Cl)2
Strunz: 
9.CO.10
Hardness: 
5.0 - 6.0
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland

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