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Steacyite

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CHA759666

Steacyite

Classic Locality

Description Tabs

Description
Locality: 
Água de Pau Volcano, São Miguel Island, Azores District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 1.8 × 1 cm
Description

specimen with a group of prismatic light apple-green gemmy quality crystals of steacyite on matrix.

The steacyite of Agua de Pau is gemmy quality because the crystals aren't metamictic for the young age

photos taken at only 20/40 enlargements!

Mineral Data
What's on the rock

Steacyite

Formula: 
(◻,K)(Na,Ca)2(Th,U)[Si8O20]
Strunz: 
9.CH.10
Hardness: 
5.0
Type Locality: 
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

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