Fuchsite | Gemopedia

This sparkling green mica is a variety of muscovite colored by chromium; the same element that colors emerald and ruby. Micas, like muscovite and biotite, are a common additive in make-up because they are soft and add twinkle to eye shadow, foundation, lipstick, and other cosmetics.
Alternate
Names
Muscovite, Chrome-Mica,Chromian Muscovite
Colors
Green

Fuchsite Classification

Common Name

Fuchsite

Species

Muscovite

Variety

Fuchsite

Colors

Green

Alternate Names

Muscovite, Chrome-Mica,Chromian Muscovite

Gemstone Groups

Mica

Key Separations

Comments

Fuchsite is the chromium rich variety of muscovite.

Fuchsite Optical Properties

Transparency

Transparent - Translucent

Refractive Index

1.552-1.615

Birefringence

0.036

Optic Character

Biaxial

Optic Sign

Negative

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV:
LWUV:

CCF Reaction

Pleochroism

None

Dispersion

Strength: weak fire

Comments

Fuchsite Chemistry & Crystallography

Chemical Name

Chemical Formula

K(Al,Cr)2[(OH,F)2/AlSi3O10]

Synthesis

Crystal System

Monoclinic

Classification

Silicate

Nature

Natural

Crystallinity

Aggregate

Comments

Fuchsite Characteristic Physical Properties

Hardness

2-3

Streak

Light Green, White

Specific Gravity

2.8-2.9

Toughness

Inclusions

Luster

Vitreous

Stability

Fracture

Cleavage

Perfect, in one direction

Comments

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