VS
Name
—
Ca₄Ce₂Fe³⁺(Be₁.₅ ₀.₅)[Si₄B₄O₂₂]O₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
—
Mohs hardness
—
3.952
Specific gravity
—
Very pale-yellow
Streak
—
Vitreous
Luster
—
None
Cleavage
—
P2/a
Space group
—
Hellandite
Structural group
—
Fmot-Ce · Approved
IMA
—
2018
Named in
—
Light yellowish brown
Typical colors
—
Ca · Ce · Fe · Be · Si · B · O
Elements
—