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Entry № 330

Plumbogummite

Plumbogummite

Botryoidal blue-green crust over old lead veins.

Chakra

Root · Third Eye

Element

Earth

Zodiac

Scorpio · Capricorn

Plumbogummite

I. The Metaphysical Reading

How the stone has been held.

Plumbogummite is worked with as a stone of transformation under pressure — a mineral that grows where older ore has broken down. Practitioners keep it for endings that have already happened but are still being processed, and for making something usable out of what is left.

Chakra
Root · Third Eye
Element
Earth
Zodiac
Scorpio · Capricorn
Keynote
Botryoidal blue-green crust over old lead veins.

II. The Scientific Reading

What the lattice actually does.

Plumbogummite is a hydrated lead aluminium phosphate of the alunite supergroup, forming in the oxidised zones of lead deposits where descending phosphate-bearing waters attack primary galena and pyromorphite. It commonly appears as botryoidal crusts and as epimorphs replacing pyromorphite crystals, notably at Yangshuo, Guangxi, China. As a lead mineral it should be handled dry and hands washed after use.

Formula
PbAl₃(PO₄)₂(OH)₅·H₂O
System
Trigonal
Hardness
4 – 5 (Mohs)
Provenance
China (Yangshuo), England (Cornwall), France

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
PbAl₃(PO₄)₂(OH)₅·H₂O
Crystal System
Trigonal
Mohs Hardness
4 – 5 (Mohs)
Density
4.0 g/cm³
Refractive Index
1.653 – 1.675
Provenance
China (Yangshuo), England (Cornwall), France
Color Origin
Blue-green, turquoise, yellowish, greyish white

Related Crystals

Stones that share this lattice

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Next in the Atlas

Prasiolite (Green Amethyst)

Amethyst that went green in the heat.