VS
Name
—
CuB(OH)₄Cl
Formula
—
Mineral Species
Entry type
—
Halides
Chemical class
—
Tetragonal
Crystal system
—
2.5
Mohs hardness
—
2.81
Specific gravity
—
Pale blue
Streak
—
Vitreous, pearly on cleavage surfaces; dull when altered
Luster
—
{001}, perfect
Cleavage
—
P4/nmm
Space group
—
—
Structural group
—
Bny · Grandfathered
IMA
—
1938
Named in
—
Deep blue with greenish portions; cendre blue to Italian blue, becoming greener with atacamite inclusions
Typical colors
—
Cu · B · O · H · Cl
Elements
—