Danalite | Gemopedia

Danalite is a very rare brown, yellow to pink-red colored mineral named for the American mineralogist James Dwight Dana in 1866. Danalite has a limited number of global sources, including the New England states of Massachusetts, Rhode Island and Delaware.
Colors
Pink, Gray, Yellow, Reddish Brown, Red

Danalite Classification

Common Name

Danalite

Species

Danalite

Variety

Colors

Pink, Gray, Yellow, Reddish Brown, Red

Alternate Names

Gemstone Groups

Key Separations

Comments

Danalite Optical Properties

Transparency

Translucent

Refractive Index

Birefringence

Optic Character

Optic Sign

Polariscope Reaction

Fluorescence

SWUV:
LWUV:

CCF Reaction

Pleochroism

Unobservable

Dispersion

Comments

Danalite Chemistry & Crystallography

Chemical Name

Chemical Formula

Fe42+(Be3Si3O12)S

Synthesis

Crystal System

Cubic

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline

Comments

Danalite Characteristic Physical Properties

Hardness

5.5-6

Streak

Specific Gravity

3.28-3.46

Toughness

Poor

Inclusions

Luster

Vitreous

Stability

Fracture

Uneven

Cleavage

Poor, in two directions

Comments

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