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Entry № 066

Blue John Fluorite

Banded Calcium Fluoride

One hill in England, and nowhere else.

Chakra

Third Eye · Crown

Element

Water · Air

Zodiac

Pisces · Capricorn

Blue John Fluorite

I. The Metaphysical Reading

How the stone has been held.

Blue John is worked with as a stone of place and inheritance, particularly for practitioners with English ancestry, and as a quiet reminder that some resources are strictly finite. It is carried during work with lineage, land and the honest accounting of what a single family has taken from a single hill.

Chakra
Third Eye · Crown
Element
Water · Air
Zodiac
Pisces · Capricorn
Keynote
One hill in England, and nowhere else.

II. The Scientific Reading

What the lattice actually does.

Blue John is a banded variety of fluorite mined from only two hills near Castleton in Derbyshire, England: Blue John Cavern and Treak Cliff Cavern. Its distinctive purple-blue and yellow bands formed within limestone cavities by episodic precipitation from hydrothermal fluids in the Carboniferous. The stone has been carved into vases and ornaments since the eighteenth century, and current extraction is limited to a few tonnes per year to conserve the deposit.

Formula
CaF₂
System
Cubic (banded massive habit)
Hardness
4 (Mohs)
Provenance
UK (Derbyshire - Castleton) as the sole global source

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
CaF₂
Crystal System
Cubic (banded massive habit)
Mohs Hardness
4 (Mohs)
Density
3.13 g/cm³
Refractive Index
1.432 – 1.434
Provenance
UK (Derbyshire - Castleton) as the sole global source
Color Origin
Alternating bands of deep purple, indigo blue and honey yellow

Related Crystals

Stones that share this lattice

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