Vlasovite

Formula: Na₂ZrSi₄O₁₁
Mineral class: silicates
Crystal system: monoclinic
Mohs scale: 6
Density (g/cm³): 2.92 - 2.97
Refractive index: 1.607 - 1.628
Cleavage: different
Colors: colorless, yellowish, pink, brownish
Transparency: transparent - translucent
Luster: greasy - pearly
Fluorescence: SW-UV: yellow-brown
Pleochroism: -
Largest crystal: 15 cm?
Deposits: Ascension (GB), Canada, Russia
Discovery: 1961?
1st Description: 1961
Name: in honor of the Russian mineralogist Kuz'ma Alekseevich Vlasov (1905 - 1964)

Vlasovite

Weight: 0.20 ct

Origin: Canada

Photo by kind permission of © www.minclassics.com

Vlasovite Mineral

Size: 4.0 x 3.8 x 2.0 cm

Origin: Kipawa Alkaline Complex / Sheffield See / Villedieu / Témiscamingue County / Québec / Kanada

Photo by kind permission of © www.irocks.com

Vlasovite

Size: 0.97 x 0.65 cm
Weight: 1.34 ct
Origin: Canada

Photo by kind permission of © www.ke4gems.com