Entry № 165
Collawood
Opalised Fossil Wood (Creede, Colorado)
Ancient wood re-cast in common opal.
Chakra
Root · Heart
Element
Earth · Water
Zodiac
Virgo · Cancer

I. The Metaphysical Reading
How the stone has been held.
Collawood is held as a stone of long memory, worked with in ancestor practice, grief tending and any ritual that honours the slow turning of a life into something else. Practitioners keep it nearby as a reminder that endings can be preserved rather than erased.
- Chakra
- Root · Heart
- Element
- Earth · Water
- Zodiac
- Virgo · Cancer
- Keynote
- Ancient wood re-cast in common opal.
II. The Scientific Reading
What the lattice actually does.
Collawood is a trade name for opalised fossil wood from the Creede caldera in Colorado, in which silica-rich groundwater percolating through Oligocene volcanic sediments replaced the original cellulose cell by cell with common (non-precious) opal, SiO₂·nH₂O. Iron oxides picked up from the host tuffs give the warm ochre banding that traces the ancient wood grain.
- Formula
- SiO₂·nH₂O replacing original cellulose
- System
- Amorphous (opal)
- Hardness
- 5.5 – 6.5 (Mohs)
- Provenance
- USA — Creede region, Colorado
References & Sources
Independent mineralogical references used to verify the scientific details above.
Mineral Profile
Fact Sheet
- Chemical Formula
- SiO₂·nH₂O replacing original cellulose
- Crystal System
- Amorphous (opal)
- Mohs Hardness
- 5.5 – 6.5 (Mohs)
- Density
- 1.98 – 2.25 g/cm³
- Refractive Index
- 1.37 – 1.47
- Provenance
- USA — Creede region, Colorado
- Color Origin
- Milky white and cream shot with ochre and rust bands following wood grain
Related Crystals
Stones that share this lattice
Next in the Atlas
Colombianite
A dark natural glass held sacred in the Andes.




