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Opal-AN & Jarosite

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PJM106426

Opal-AN & Jarosite

Description Tabs

Description
Locality: 
Moculta Phosphate Quarry, Angaston, Barossa Valley, Mount Lofty Ranges, South Australia, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3.6 × 3.2 cm
Description

An open boxwork of limonitic matrix has been completely replaced by opal, giving the once soft matrix a hard surface and a lustrous sheen. In the remaining voids in the boxwork, gemmy rich yelowish orange jarosite crystals have formed as isolated singles.

Mineral Data
What's on the rock

Opal-AN

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

Jarosite

Formula: 
KFe3+ 3(SO4)2(OH)6
Strunz: 
7.BC.10
Crystal System: 
Trigonal - Pyramidal Class
Hardness: 
2.5 - 3.5
Type Locality: 
Jaroso Ravine, Sierra Almagrera, Cuevas del Almanzora (Cuevas de Vera), Almería, Andalusia, Spain
Earthstones Australia

Seller Information

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All goods must be paid for prior to shipping, all bids are binding.