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Minerals A-E
Euclase
Name
Euclase
Chemistry
BeAlSiO4OH, Beryllium Aluminum Silicate Hydroxide
Uses
Gemstone and mineral specimen
Color
Blue-green, blue, yellow, light green and rarely purple
Hardness
7.5
Specific gravity
3.09-3.15
Streak
White
Crystals
(Monoclinic) Long and short prisms, vertically striped, multifaceted; surface growth; rare
Accompanied by:
Quartz, feldspars, beryl, topaz, tourmaline and muscovite.
Similar to:
Quartz, aquamarine, hiddenite and albite
The name Euclase means easily cleaved.
It is difficult to cut because it can easily cleave in the wrong direction.
It can be a real treasure in your collection due to it's rarity.
Because of it's rarity it has never reached popularity status.
The crystals of euclase are normally prismatic with slanted termination faces. Nice crystals of euclase are very popular with serious collectors.
Euclase is formed with the decomposition of Beryl in the presence of topaz. It has a similar crystal formation as celestite and barite but it occurs in a different environment. Forms in granitic pegmatites as secondary beryllium minerals. Also occurs as placer deposits
