Chrome Diopside | Gemopedia

Chrome diopside has several origins, but most of the finest material, and the only commercially viable deposit, is in the Republic of Sakha in Siberia, Russia. As you can imagine, production of this Siberian treasure is sporadic due to extreme winters that last more than eight months. The vivid greens of chrome diopside are a welcome alternative to rare and pricey emerald or tsavorite garnet, but has yet to gain mainstream recognition due to its limited availability. Minor sources of chrome diopside include Australia, Austria, Canada, Finland, Italy, Madagascar, South Africa and the United States.
Alternate Names
Tashmarine (Yellowish Green Material)
Colors
Medium Dark Vivid Green, Bluish Green To Yellowish Green

Chrome Diopside Classification

Common Name

Chrome Diopside

Species

Diopside

Variety

Chrome Diopside

Colors

Medium Dark Vivid Green, Bluish Green To Yellowish Green

Alternate Names

Tashmarine (Yellowish Green Material)

Gemstone Groups

Pyroxene

Key Separations

refractive index, birefringence, optic character and spectrum. Chrome diopside may be separated from ordinary green diopside by their respective spectra; ordinary green does not have lines in the orange and red characteristic of the presence of chromium.

Comments

Chrome Diopside Optical Properties

Transparency

Transparent - Opaque

Refractive Index

1.675-1.701
Tolerance:(+0.029/-0.010)

Birefringence

0.024-0.03

Optic Character

Biaxial

Optic Sign

Positive

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Inert
LWUV: Green

CCF Reaction

Pleochroism

Dichroic, weak to strong light and dark green

Dispersion

Strength: moderate fire Value: 0.02

Comments

Chrome Diopside Chemistry & Crystallography

Chemical Name

calcium magnesium silicate

Chemical Formula

CaMgSi2O6

Synthesis

Crystal System

Monoclinic

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline

Comments

Chrome Diopside Characteristic Physical Properties

Hardness

5.5-6.5

Streak

Specific Gravity

3.22-3.4 Range:0.11/-0.07 Typical:3.29

Toughness

Poor

Inclusions

Black needle-like magnetite inclusions that might be magnetic, metallic like inclusions and liquid inclusions.

Luster

Vitreous

Stability

Fracture

Conchoidal, Uneven

Cleavage

Good, in two directions

Comments

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