Entry № 053
Black Star Diopside
Calcium Magnesium Silicate with Magnetite
A four-rayed star crossed on dark stone.
Chakra
Heart · Root
Element
Earth
Zodiac
Virgo · Pisces

I. The Metaphysical Reading
How the stone has been held.
Black star diopside is worked with as a stone of quiet guidance and reconciliation, particularly with maternal lineage. Practitioners speak of the four-rayed star as a compass reminding the bearer that even in darkened seasons an orientation remains available.
- Chakra
- Heart · Root
- Element
- Earth
- Zodiac
- Virgo · Pisces
- Keynote
- A four-rayed star crossed on dark stone.
II. The Scientific Reading
What the lattice actually does.
Black star diopside is a variety of the pyroxene diopside whose opaque black body is threaded with oriented magnetite needles. When cut en cabochon parallel to the crystal's basal plane, the reflections from two intersecting sets of needles form a sharp four-rayed star, an unusual asterism (most star stones show six rays). The Indian deposits of Karnataka and Tamil Nadu remain the sole commercial source.
- Formula
- CaMgSi₂O₆ with oriented magnetite needles
- System
- Monoclinic
- Hardness
- 5.5 – 6.5 (Mohs)
- Provenance
- India (Karnataka, Tamil Nadu)
References & Sources
Independent mineralogical references used to verify the scientific details above.
Mineral Profile
Fact Sheet
- Chemical Formula
- CaMgSi₂O₆ with oriented magnetite needles
- Crystal System
- Monoclinic
- Mohs Hardness
- 5.5 – 6.5 (Mohs)
- Density
- 3.22 – 3.38 g/cm³
- Refractive Index
- 1.663 – 1.699
- Provenance
- India (Karnataka, Tamil Nadu)
- Color Origin
- Opaque black with a silvery four-rayed star (asterism)
Related Crystals
Stones that share this lattice
Next in the Atlas
Bladed Calcite
Paper-thin stone stacked like petals.




