Entry № 014
Alurgite
Manganoan Muscovite
The rose leaf of the mica book.
Chakra
Heart · Root
Element
Earth
Zodiac
Capricorn

I. The Metaphysical Reading
How the stone has been held.
A quiet, uncommon stone of steadfast affection. Traditional use frames alurgite as a companion for slow emotional labour - the reconciliations that take seasons rather than moments. Its layered cleavage is read as a metaphor for accumulated care.
- Chakra
- Heart · Root
- Element
- Earth
- Zodiac
- Capricorn
- Keynote
- The rose leaf of the mica book.
II. The Scientific Reading
What the lattice actually does.
Alurgite is the manganoan variety of muscovite, coloured by Mn³⁺ in the octahedral site. It forms in metamorphosed manganese-bearing sediments and is closely associated with braunite and piemontite in the schists of the Western Alps, where it was first described in the 19th century. Perfect basal cleavage yields the classic mica-book form.
- Formula
- K(Al,Mn³⁺)₂(Si,Al)₄O₁₀(OH)₂
- System
- Monoclinic (mica group)
- Hardness
- 2.5 – 3 (Mohs)
- Provenance
- Italy (Piedmont - Valle d'Aosta), Switzerland
References & Sources
Independent mineralogical references used to verify the scientific details above.
Mineral Profile
Fact Sheet
- Chemical Formula
- K(Al,Mn³⁺)₂(Si,Al)₄O₁₀(OH)₂
- Crystal System
- Monoclinic (mica group)
- Mohs Hardness
- 2.5 – 3 (Mohs)
- Density
- 2.85 – 2.95 g/cm³
- Refractive Index
- 1.560 – 1.610
- Provenance
- Italy (Piedmont - Valle d'Aosta), Switzerland
- Color Origin
- Deep raspberry to violet-red - trivalent manganese
Related Crystals
Stones that share this lattice
Next in the Atlas
Amber
Sunlight, kept.




