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Baryte & Pyrite

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NST656818

Baryte & Pyrite

Description Tabs

Description
Locality: 
Roger Quarries, João Pessoa, Paraiba, Brazil
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4.5 × 3 cm
Largest Crystal: 
2.50cm
Description

Attractive matrix specimen of baryte with sulfidic inclusions from a limestone quarry in the Paraiba District. The baryte blades are up to 2.5 cm, the whole aggregate measures 3.4 cm an is attached on matrix, which is scarce from this seldom offered locality. This example also hosts small limonite pseudomorphs after pyrite on the underlying matrix.

Mineral Data
What's on the rock

Baryte

Formula: 
BaSO4
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
Streak: 
White

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5