Entry № 013
Allophane
Hydrous Aluminium Silicate
Blue milk of the volcano.
Chakra
Throat · Heart
Element
Water · Earth
Zodiac
Libra

I. The Metaphysical Reading
How the stone has been held.
Allophane is spoken of as a gentle stone of emotional recovery - carried by those in the tender period after grief. Its soft blues are read as the presence of a quiet, watchful attention, and it is often paired with harder heart stones as a calming counterweight.
- Chakra
- Throat · Heart
- Element
- Water · Earth
- Zodiac
- Libra
- Keynote
- Blue milk of the volcano.
II. The Scientific Reading
What the lattice actually does.
Allophane is a nanoscale clay mineral formed by the weathering of volcanic ash. It is not truly crystalline: its structure consists of hollow nanospheres about 3.5–5 nm in diameter, with short-range order but no long-range lattice. This gives it an extraordinarily high specific surface area and makes it a major carbon-storage phase in andic volcanic soils.
- Formula
- Al₂O₃·(SiO₂)₁.₃₋₂·(H₂O)₂.₅₋₃
- System
- Amorphous to short-range ordered
- Hardness
- 3 (Mohs)
- Provenance
- Japan, Germany, New Zealand, France, USA
References & Sources
Independent mineralogical references used to verify the scientific details above.
Mineral Profile
Fact Sheet
- Chemical Formula
- Al₂O₃·(SiO₂)₁.₃₋₂·(H₂O)₂.₅₋₃
- Crystal System
- Amorphous to short-range ordered
- Mohs Hardness
- 3 (Mohs)
- Density
- 1.85 – 1.89 g/cm³
- Refractive Index
- 1.470 – 1.510
- Provenance
- Japan, Germany, New Zealand, France, USA
- Color Origin
- Pale blue, green, white - often coloured by trace Cu²⁺
Related Crystals
Stones that share this lattice
Next in the Atlas
Alurgite
The rose leaf of the mica book.




