Diopside | Gemopedia

Diopside can be colorless but it most often a bottle green, brownish green or light green. Bright green diopside is commonly known as chrome diopside because of its chromium content. A rare blue variety known as violan may be found in Italy.
Alternate
Names
Tashmarine(TM),Shanseres(R), Star Diopside, Cat's-Eye Diopside, Malacolite, Alalite, Violane, Chrome Diopside
Colors
Green, Brown, Black, Blue To Violet, Colorless To White

Diopside Classification

Common Name

Diopside

Species

Diopside

Variety

Colors

Green, Brown, Black, Blue To Violet, Colorless To White

Alternate Names

Tashmarine(TM),Shanseres(R), Star Diopside, Cat's-Eye Diopside, Malacolite, Alalite, Violane, Chrome Diopside

Gemstone Groups

Pyroxene

Key Separations

refractive index, birefringence, optic character and spectrum. Chrome diopside may be separate 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

Star diopside and Cat's-eye diopside are the varieties displaying asterism and chatoyancy.Malacolite are translucent stones that are light in color.Alalite is colorless to faint greenish or light yellowish green variety of diopside.Violane is the translucent to opaque blue-violet aggregate variety.Chrome diopside: transparent medium dark green that is colored by chromium.Tashmarine(TM) yellowish green material.Shanseres (R): pale yellowish green

Diopside Optical Properties

Transparency

Semitranslucent - 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: strong blue to bluish white
LWUV: inert to weak blue

CCF Reaction

Pleochroism

Dichroic, weak to strong light green and dark green

Dispersion

Strength: moderate fire Value: 0.02

Comments

Diopside Chemistry & Crystallography

Chemical Name

calcium magnesium silicate

Chemical Formula

CaMgSi2O6

Synthesis

Crystal System

Monoclinic

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline

Comments

Diopside Characteristic Physical Properties

Hardness

5.5-6

Streak

White To White Green

Specific Gravity

3.22-3.4 Typical:3.29

Toughness

Varies

Inclusions

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

Luster

Vitreous

Stability

Fair

Fracture

Conchoidal, Uneven

Cleavage

Good, in two directions

Comments

JTV on Google+
0 Items
My Wish List
Close
Item
Description
Qty.
Price


Estimated Order Total:
0
Total Due Today:
0
Close
Item
Description
Qty.
Price


Page of 1