Rhodonite (single crystal) | Gemopedia

Rhodonite is an attractive mineral that is primarily known as an ornamental stone, but is often seen in jewelry in the form of beads or cabochons. This mineral easily falls into the category of rare and exotic, making it highly prized by collectors of specimens and gemstones. Its name, derived from two Greek roots, means "rose-colored stone." Rhodonite, which is commonly found in massive or granular forms, is most often translucent to opaque in appearance. On rare occasion, transparent, gem-quality material may be found. Rhodonite's natural color ranges from pink to rose red to brownish red, often with blackish veins throughout.
Colors
Red, Orangy Red, Pink

Rhodonite (single crystal) Classification

Common Name

Rhodonite (single crystal)

Species

Rhodonite

Variety

Single Crystal Rhodonite

Colors

Red, Orangy Red, Pink

Alternate Names

Gemstone Groups

Key Separations

RI, birefringence and spectrum.

Comments

Rhodonite (single crystal) Optical Properties

Transparency

Transparent - Translucent

Refractive Index

1.733-1.747
Tolerance:(+0.010/-0.013)

Birefringence

0.01-0.014

Optic Character

Biaxial

Optic Sign

Positive

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Inert
LWUV: Inert

CCF Reaction

Pleochroism

Dichroic, weak to moderate orangy red and brownish red

Dispersion

Strength: none

Comments

Rhodonite (single crystal) Chemistry & Crystallography

Chemical Name

manganese iron magnesium calcium silicate

Chemical Formula

(Mn, Fe, Mg, Ca) SiO3

Synthesis

Crystal System

Triclinic

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline

Comments

Rhodonite (single crystal) Characteristic Physical Properties

Hardness

5.5-6.5

Streak

White

Specific Gravity

3.3-3.76 Typical:3.5

Toughness

Poor

Inclusions

Rhodonite stones sometimes have black dendritic inclusions of manganese oxide.

Luster

Vitreous

Stability

Fracture

Conchoidal

Cleavage

Perfect, in two directions

Comments

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