Epididymite

Epididymite Aegirina. Zomba-Malosa. Malawi Overall size: 13mm x 16 mm x 29 mm © minservice

Chemical Formula: Na2Be2Si6O15 · H2O
Locality: Island of Aro, Langesundfiord, Norway.
Name Origin: From the Greek epi, “near” and didymos, “twin”, for its dimorphous relationship with eudidymite

Physical Properties

Cleavage: {001} Perfect, {010} Perfect
Color: Colorless, White, Gray, Yellow, Blue.
Density: 2.55
Diaphaneity: Transparent to translucent
Fracture: Brittle – Generally displayed by glasses and most non-metallic minerals.
Hardness: 5.5 – Knife Blade
Luster: Vitreous (Glassy)
Streak: white

Photos :

Epididymite, Manganeptunite, Catapleiite ps Sodalite 4.9×3.6×2.7 cm Mont Saint-Hilaire Quebec, Canada Copyright © David K. Joyce Minerals
Epididymite Mt Malosa, Zomba District, Malawi Size: 6.0 x 2.0 x 0.3 cm © danweinrich
Epididymite 3.2×2.0x1.5 cm Mont Saint-Hilaire Quebec, Canada Copyright © David K. Joyce Minerals
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