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Entry № 227

Guinea Fowl Jasper

Chalcedony (Orbicular, Madagascar)

Madagascan jasper spotted like the bird that shares its name.

Chakra

Root

Element

Earth

Zodiac

Virgo · Capricorn

Guinea Fowl Jasper

I. The Metaphysical Reading

How the stone has been held.

Guinea fowl jasper is worked with as a stone of pattern recognition and camouflage wisdom, held when someone needs to blend into a group while keeping their individual spots intact. It is a stone of belonging without conformity.

Chakra
Root
Element
Earth
Zodiac
Virgo · Capricorn
Keynote
Madagascan jasper spotted like the bird that shares its name.

II. The Scientific Reading

What the lattice actually does.

Guinea fowl jasper is a silicified rhyolite or chalcedony from Madagascar that displays a distinctive orbicular or spotted pattern of grey, black, and cream chalcedony in spherical or ellipsoidal aggregates. The spots form during devitrification of volcanic glass, where silica-rich solutions precipitate successive layers of chalcedony around nuclei such as iron oxide or clay minerals. The pattern is the result of rhythmic precipitation, similar to ocean jasper.

Formula
SiO₂ (cryptocrystalline chalcedony)
System
Trigonal
Hardness
6.5 – 7 (Mohs)
Provenance
Madagascar

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
SiO₂ (cryptocrystalline chalcedony)
Crystal System
Trigonal
Mohs Hardness
6.5 – 7 (Mohs)
Density
2.58 – 2.64 g/cm³
Refractive Index
1.530 – 1.543
Provenance
Madagascar
Color Origin
Grey, black, and cream spotted pattern from rhythmic chalcedony precipitation

Related Crystals

Stones that share this lattice

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Next in the Atlas

Guinea Fowl Quartz

Quartz that carries the spotted signature of the guinea fowl.