Diopside is a common mineral from the pyroxene group, prized for its variety of colors and attractive vitreous luster. Its palette includes various shades of green (from pale to intense), as well as brown, black, gray, yellowish, and sometimes even colorless or bluish.
Its vibrant green variety, chrome diopside, is particularly valued, with its color attributed to chromium impurities. This stone is often called the 'Siberian Emerald' due to its rich color and famous deposits in Yakutia. Rare varieties also exist with asterism (star diopside) or the cat's eye effect.
Diopside primarily forms in metamorphic rocks (such as marbles and skarns) and some igneous rocks. It is also found in kimberlites and, rarely, in meteorites. Significant diopside deposits are located in Italy (a classic locality), Canada, Pakistan, Myanmar, the USA, Finland, and Madagascar. Thanks to its beauty and relative accessibility, diopside is used in jewelry (especially transparent green varieties and chrome diopside) and is a popular object for mineral collecting. It is valued for its natural aesthetics and diversity of forms and shades.
Diopside is a mineral that attracts both collectors with its diversity and connoisseurs of natural beauty with its rich colors.
Physical properties
Chemical formula
CaMgSi₂O₆
Hardness
5.5 - 6.5 on the Mohs scale
Crystal system
Monoclinic
Transparency
Transparent to translucent, sometimes opaque
Luster
Vitreous
Color
Green (various shades), brown, black, gray, yellowish, colorless, blue-green
Specific gravity
3.22 - 3.38
Varieties
Jewelry with this mineral
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