Compare Minerals
Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.
Name
—
NaNa₂(Mg₄Fe³⁺)Si₈O₂₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
6
Mohs hardness
—
3.1–3.3
Specific gravity
—
—
Streak
—
Vitreous
Luster
—
[Perfect on {110}, intersecting at ~56° and ~124°.]
Cleavage
—
C2/m
Space group
—
Amphibole
Structural group
—
Marf · Approved
IMA
—
1957
Named in
—
Dark bluish green, color zoning common; yellowish, greenish, or bluish in thin section
Typical colors
—
Na · Mg · Fe · Si · O · H
Elements
—