Charoite | Gemopedia

Charoite offers an intriguing, mystical array of patterns that are both eye-catching and mesmerizing. The patterns often exhibit a combination of swirls, veins and spots that give each piece a unique and magical appearance. The name Charoite is used to describe both a mineral and an attractive gem material primarily composed of charoite. The gem material comes from the remote, mountainous region of the Sakha Republic of Russia, which remains its only known source.
Colors
Purple With Swirls, Spots Of Black, Gray, White, Brownish Orange

Charoite Classification

Common Name

Charoite

Species

Charoite

Variety

Colors

Purple With Swirls, Spots Of Black, Gray, White, Brownish Orange

Alternate Names

Gemstone Groups

Key Separations

Appearence, RI, and possibly fluorescence

Comments

Conglomerate of charoite, aegirine-augite, feldspar and tinaksite and other materials that might give different RI readings.Often displays 1.55 or 1.56 spot reading.

Charoite Optical Properties

Transparency

Semitranslucent - Opaque

Refractive Index

1.55-1.559
Tolerance:(+0.002/-0.002)

Birefringence

Optic Character

Biaxial

Optic Sign

Positive

Polariscope Reaction

Aggregate (AGG)

Fluorescence

SWUV: Inert to patchy weak red
LWUV: Inert to patchy weak red

CCF Reaction

Pleochroism

Unobservable

Dispersion

Comments

Charoite Chemistry & Crystallography

Chemical Name

hydrated potassium calcium sodium hydroxide fluoride

Chemical Formula

(K,Na)5(Ca,Ba,Sr)8(Si6O15)2Si4O9(OH,F).11H2O

Synthesis

Crystal System

Monoclinic

Classification

Rock

Nature

Natural

Crystallinity

Aggregate

Comments

Charoite Characteristic Physical Properties

Hardness

5-6

Streak

White

Specific Gravity

2.54-2.78 Typical:2.68

Toughness

Fair

Inclusions

Charoite has a fibrous or flame-like appearance with swirls and spots of black, gray, white or brownish orange.

Luster

Vitreous

Stability

Fracture

Splintery, Granular

Cleavage

Good, in three directions

Comments

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