description Star Diopside Overview
Star diopside is a variety of the pyroxene mineral diopside that shows asterism, a star-like reflection of light. The effect is usually caused by aligned inclusions or internal structures, and properly oriented cabochon cuts can display a four-rayed star. The material is commonly black or very dark green and is used for jewelry and ornamental stones. India is a well-known source of star diopside used in the gem trade.
help Star Diopside FAQ
What is star diopside?
Star diopside is a variety of the pyroxene mineral diopside that shows asterism, or a star-like reflection. The effect is usually visible after the material is cut and polished as a cabochon.
How many rays can star diopside show?
Properly oriented star diopside can display a four-rayed star. The pattern depends on aligned inclusions or internal structures in the material.
Why does star diopside show a star?
The star effect comes from aligned inclusions or internal structures that reflect light in a directional pattern. Cutting orientation is important because a poorly oriented stone may not show the asterism clearly.
How is star diopside cut?
It is commonly cut as a cabochon, with a smooth rounded surface rather than facets. This shape lets the reflected light form a visible star across the top of the stone.
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