VS
Name
—
Na₃CaZrSi₆O₁₅(OH)₃
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5
Mohs hardness
—
2.38–2.71
Specific gravity
—
Brown
Streak
—
Vitreous, resinous to dull
Luster
—
Two directions, imperfect
Cleavage
—
R3
Space group
—
Lovozerite-Zirsinalite–Lovozerite
Structural group
—
Lvz · Grandfathered
IMA
—
1939
Named in
—
Red-brown, dark brown, black; in thin section, yellowish pink, with altered regions dark brown
Typical colors
—
Na · Ca · Zr · Si · O · H
Elements
—