Entry № 047
Black Moonstone
Orthoclase-Albite Feldspar
The moon on a new-moon night.
Chakra
Root · Third Eye
Element
Water · Earth
Zodiac
Cancer · Scorpio

I. The Metaphysical Reading
How the stone has been held.
Black moonstone is carried as a companion for the darker moons, the new moon in particular, when a practitioner is setting rather than harvesting. It is worked with for beginnings that have to be made in private, and for cycles of the body and life that need to be observed rather than pushed.
- Chakra
- Root · Third Eye
- Element
- Water · Earth
- Zodiac
- Cancer · Scorpio
- Keynote
- The moon on a new-moon night.
II. The Scientific Reading
What the lattice actually does.
Black moonstone is a variety of orthoclase-albite feldspar in which fine perthitic intergrowths scatter light into the soft blue sheen called adularescence. Its dark ground comes from finely distributed inclusions of amphibole, biotite and hematite; when polished it retains the silvery flash of paler moonstone against a smoky base. Madagascar is currently the principal commercial source.
- Formula
- (K,Na)AlSi₃O₈
- System
- Monoclinic (perthitic intergrowth)
- Hardness
- 6 – 6.5 (Mohs)
- Provenance
- Madagascar, India, Sri Lanka
References & Sources
Independent mineralogical references used to verify the scientific details above.
Mineral Profile
Fact Sheet
- Chemical Formula
- (K,Na)AlSi₃O₈
- Crystal System
- Monoclinic (perthitic intergrowth)
- Mohs Hardness
- 6 – 6.5 (Mohs)
- Density
- 2.56 – 2.62 g/cm³
- Refractive Index
- 1.518 – 1.526
- Provenance
- Madagascar, India, Sri Lanka
- Color Origin
- Dark grey to smoky black with blue and silver adularescence
Related Crystals
Stones that share this lattice
Next in the Atlas
Black Obsidian
The mirror the earth cooled too fast to lose.




