Formula: BeAl[SiO₄]OH
Mineral class: silicates
Crystal system: monoclinic
Mohs scale: 7.5
Density (g/cm³): 3.1
Refractive index: 1.650 - 1.677
Cleavage: different
Colors: colorless, yellowish, green, blue, violet
Luster: vitreous
Fluorescence: -
Pleochroism: slightly greenish
Largest Euclase: 12 cm?
Deposits: Brazil, India, Zimbabwe, Tanzania, Russia, Zaire
Discovery: 1792
1st Description: 1892
Name: a combination of the Greek words "eu" (good), and "klásis" (break)

Euclase

Size: 1.9 x 0.8 x 0.5 cm

Origin: Antonio Pereira / Ouro Preto / Minas Gerais / Brazil

Photo by kind permission of © www.steveperrygems.com

Euclase

Weight: 1.55 ct

Origin: Brazil

Photo by kind permission of © www.irocks.com

Euclase Mineral

Origin: Espírito Santo / Brazil

Photo by kind permission of © www.irocks.com

Euclase Mineral

Origin: Conselheiro Pena / Minas Gerais / Brazil

Photo by kind permission of © www.treasuremountainmining.com

Euclase

Size: 1.60 x 1.56 cm
Weight: 16.90 ct
Origin: Brazil

Photo by kind permission of © www.ke4gems.com

Euclase

Weight: 3.78 ct

Origin: Brazil

Photo by kind permission of © www.multicolour.com

Euclase Mineral

Size: 1.5 x 1.0 x 0.5 cm

Origin: Minas Gerais / Brazil

Photo by kind permission of © www.collectorfinejewelry.com

Euclase

Weight: 2.66 ct

Origin: Brazil

Photo by kind permission of © www.djraregems.com

Euclase

Size: 0.50 x 0.42 cm
Weight: 0.56 ct
Origin: Colombia

Photo by kind permission of © www.gemfrance.com

Euclase Mineral

Size: 1.2 x 0.7 x 0.4 cm

Origin: Ouro Preto / Minas Gerais / Brazil

Photo by kind permission of © http://lucianabarbosa.com

Euclase

Size: 0.52 x 0.47 cm
Weight: 0.54 ct
Origin: Colombia

Photo by kind permission of © www.gemfrance.com

Euclase

Weight: 0.62 ct

Origin: Ouro Preto / Minas Gerais / Brazil

Photo by kind permission of © http://lucianabarbosa.com

Euclase Mineral

Size: 0.7 x 0.4 x 0.3 cm

Origin: Parelhas / Rio Grande do Norte / Brazil

Photo by kind permission of © www.qualitygemsminerals.com

Euclase Mineral

Size: 1.4 x 1.3 x 0.8 cm

Origin: Chivor / Guavio-Guateque Mining Distr. / Boyacá Dep. / Colombia

Photo: John McLean, by kind permission of © http://www.palagems.com

Euclase

Weight: 0.28 ct
Size: 0.4 cm
Origin: Brazil

Photo by kind permission of © www.kox-gems.com

Euclase Mineral

Origin: Miami Mine / Karoi / Zimbabwe

Photo by kind permission of © www.irocks.com

Euclase

Origin: Zimbabwe

Photo by kind permission of © www.irocks.com

Euclase Mineral

Size: 0.65 x 0.65 x 0.83 cm

Origin: Chivor / Guavio-Guateque Mining Distr. / Boyacá Dep. / Colombia

Photo by kind permission of © www.civilminerals.com