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Phillipsite-K Chabazite-K Thomsonite & Calcite

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Phillipsite-K Chabazite-K Thomsonite & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Vallerano Quarries, Valleranello, Rome Province, Lazio, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.5 × 2.5 cm
Description

Classic piece from an old and currently inaccessible locality.

A piece of lava with many spherical aggregates of phillipsite-K and chabazite-k up to 5mm, with smaller balls of thomsonite up to 0.8mm, and calcite crystals up to 3mm.

Really fine and aesthetic piece.

 

Mineral Data
What's on the rock

Phillipsite-K

Formula: 
(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Strunz: 
9.GC.10
Crystal System: 
Monoclinic
Hardness: 
4.0 - 5.0
Colour: 
White
Streak: 
White
Type Locality: 
Capo di Bove, Rome Province, Latium, Italy

Chabazite-K

Formula: 
(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0
Streak: 
White
Type Locality: 
Ercolano, Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Thomsonite

Synonym Of: 

Thomsonite-Ca

Formula: 
NaCa2[Al5Si5O20]·6H2O
Strunz: 
9.GA.10
Hardness: 
5.0 - 5.5

Thomsonite-Sr

Formula: 
Na(Sr,Ca)2[Al5Si5O20]·7H2O
Strunz: 
9.GA.10
Hardness: 
5.0 - 0.0

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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