Entry № 204
Geyserite
Siliceous Sinter (Opal-A)
The cream deposit a geyser leaves as it breathes.
Chakra
Crown · Sacral
Element
Water · Fire
Zodiac
Pisces · Aquarius

I. The Metaphysical Reading
How the stone has been held.
Geyserite is worked with as a stone of rhythmic release, carried by practitioners who work in cycles of build and vent. It is held to help the body honour a schedule of expression rather than storing pressure indefinitely.
- Chakra
- Crown · Sacral
- Element
- Water · Fire
- Zodiac
- Pisces · Aquarius
- Keynote
- The cream deposit a geyser leaves as it breathes.
II. The Scientific Reading
What the lattice actually does.
Geyserite is a variety of siliceous sinter — amorphous opal-A precipitated from silica-supersaturated hot-spring and geyser water as it cools at the surface. Each eruption or splash deposits a thin silica film, and successive layers build up the characteristic laminated, botryoidal and sometimes pisolitic aprons around geyser vents. It is also one of the oldest recognised habitats for microbial life on Earth.
- Formula
- SiO₂·nH₂O (amorphous opal-A)
- System
- Amorphous
- Hardness
- 5 – 6 (Mohs)
- Provenance
- USA (Yellowstone), Iceland, New Zealand (Taupō), Chile
References & Sources
Independent mineralogical references used to verify the scientific details above.
Mineral Profile
Fact Sheet
- Chemical Formula
- SiO₂·nH₂O (amorphous opal-A)
- Crystal System
- Amorphous
- Mohs Hardness
- 5 – 6 (Mohs)
- Density
- 1.90 – 2.30 g/cm³
- Refractive Index
- 1.40 – 1.46
- Provenance
- USA (Yellowstone), Iceland, New Zealand (Taupō), Chile
- Color Origin
- Cream, pale grey to white, layered and botryoidal
Related Crystals
Stones that share this lattice
Next in the Atlas
Gibbsite
The pale mineral behind every aluminium object.




