Mineral description : Euclase

Mineral class	Silicates :
Chemical formula	BeAlSiO4(OH)
Crystal system	Monoclinic
Habitus	Prismatic striated crystals.
Cleavage	Perfect, conchoidal fracture.
Hardness	7.5
Density	3.05-3.10
Color	Usually colorless, sometimes whitish or pale green to blue. Transprarent to translucent.
Streak	White.
Luster	Vitreous.
Description
Occurance	Forms in granitic pegmatites as secondary beryllium minerals. Also occurs as placer deposits.
Associates	Beryl, bertrandite, phenakite.
Notes	Picture in "Die Mineralien und Fundstellen von Sweden", tafel 13.
Locations	A rare mineral in Sweden Högsbo, Göteborg. Rumors tells of a crystal 7x5x2 mm. Stora vika limestone quarry, Nynäshamn. As small crystals in bertrandite. Kolsva feldspar quarry, Köping. As crystals up to 3 mm with Bertrandite. Sels-vitberget, Bollstabruk. As small crystals in altered beryl.

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