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Siderite & Phillipsite

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PJM85821

Siderite & Phillipsite

Ex J & S Mommers Collection.

Description Tabs

Description
Locality: 
Pioneer Quarry, Narre Warren North, Casey, Victoria, Australia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 1.8 × 1.1 cm
Description

A flat cavity in dense basalt is lined with light grey botyroidal montmorillionite. Over this lined matrix the individual mounds are netted in brown " basket weave" siderite crystals. scattered amongst these baskets are clear phillipsite crystal. This specimen was colected from a small ledge in the road metal quarry at Narre Warren in the early 1980's. The locale has long since been lost to collectors.

Mineral Data
What's on the rock

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

Phillipsite

Synonym Of: 

Phillipsite-Ca

Formula: 
(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32 . 12H2O
Strunz: 
9.GC.10
Hardness: 
4.0 - 5.0

Phillipsite-K

Formula: 
(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Strunz: 
9.GC.10
Hardness: 
4.0 - 5.0

Phillipsite-Na

Formula: 
(Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32]·12H2O
Strunz: 
9.GC.10
Hardness: 
4.0 - 5.0
Group Parent: 
Zeolite Group
Earthstones Australia

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