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Entry № 333

Preseli Bluestone

Spotted dolerite

The stone that walked to Stonehenge.

Chakra

Throat · Third Eye

Element

Earth · Air

Zodiac

Capricorn · Sagittarius

Preseli Bluestone

I. The Metaphysical Reading

How the stone has been held.

Preseli bluestone is treated as a stone of ancestral memory and place. British practitioners keep it for dreamwork, for reconnecting with land and lineage, and for ceremonies at solstice — its reputation resting on its documented journey from Welsh hills to Salisbury Plain.

Chakra
Throat · Third Eye
Element
Earth · Air
Zodiac
Capricorn · Sagittarius
Keynote
The stone that walked to Stonehenge.

II. The Scientific Reading

What the lattice actually does.

Preseli bluestone is a spotted dolerite from the Mynydd Preseli in Pembrokeshire, Wales, composed chiefly of plagioclase feldspar and augite with distinctive pale spots of altered feldspar. Petrological and geochemical work has matched the bluestone monoliths at Stonehenge to specific outcrops such as Carn Goedog and Craig Rhos-y-felin, roughly 225 km from the monument. The rock is also weakly magnetic in places due to its iron-titanium oxide content.

Formula
Ca(Mg,Fe)Si₂O₆ + plagioclase feldspar
System
Monoclinic + triclinic (rock)
Hardness
6 – 7 (Mohs)
Provenance
Preseli Hills, Pembrokeshire, Wales

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
Ca(Mg,Fe)Si₂O₆ + plagioclase feldspar
Crystal System
Monoclinic + triclinic (rock)
Mohs Hardness
6 – 7 (Mohs)
Density
2.9 – 3.1 g/cm³
Refractive Index
1.66 – 1.72
Provenance
Preseli Hills, Pembrokeshire, Wales
Color Origin
Blue-grey to blue-green with white feldspar spots

Related Crystals

Stones that share this lattice

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