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Entry № 197

Fuji Lava Stone

Fuji Basalt (Vesicular)

A porous piece of Japan's most patient volcano.

Chakra

Root

Element

Fire · Earth

Zodiac

Aries · Capricorn

Fuji Lava Stone

I. The Metaphysical Reading

How the stone has been held.

Fuji lava stone is worked with as a stone of grounded release, often carried as a diffuser bead where a drop of essential oil is absorbed into its pores. Practitioners hold it as a stone that takes on what it is asked to carry — and as a reminder to periodically empty it out.

Chakra
Root
Element
Fire · Earth
Zodiac
Aries · Capricorn
Keynote
A porous piece of Japan's most patient volcano.

II. The Scientific Reading

What the lattice actually does.

Fuji lava stone is vesicular basalt erupted from Mount Fuji's stratovolcanic system, whose porous texture comes from gas bubbles trapped as the low-viscosity basaltic magma quenched at the surface. It is a plagioclase-pyroxene-olivine assemblage typical of subduction-zone basalts; the porosity is what makes it useful as an oil-holding bead but also relatively fragile compared with solid basalt.

Formula
Basalt: plagioclase + pyroxene + olivine glass
System
Aggregate (extrusive igneous, vesicular)
Hardness
5 – 6 (Mohs)
Provenance
Japan — Mount Fuji volcanic province

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
Basalt: plagioclase + pyroxene + olivine glass
Crystal System
Aggregate (extrusive igneous, vesicular)
Mohs Hardness
5 – 6 (Mohs)
Density
2.60 – 3.00 g/cm³ (solid); much lower vesicular
Refractive Index
1.55 – 1.60 (bulk)
Provenance
Japan — Mount Fuji volcanic province
Color Origin
Matte charcoal to iron-black porous basalt

Related Crystals

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A clear window onto a landscape that stopped growing.