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Entry № 234

Hemimorphite

Zn₄Si₂O₇(OH)₂·H₂O

Blue crust that grows where zinc meets water.

Chakra

Throat · Heart

Element

Water · Air

Zodiac

Libra · Pisces

Hemimorphite

I. The Metaphysical Reading

How the stone has been held.

Hemimorphite is worked with as a stone of compassionate communication, held when the throat needs to speak what the heart already knows. Its watery blue is said to soften defensiveness and open honest conversation.

Chakra
Throat · Heart
Element
Water · Air
Zodiac
Libra · Pisces
Keynote
Blue crust that grows where zinc meets water.

II. The Scientific Reading

What the lattice actually does.

Hemimorphite is a hydrous zinc silicate that forms in the oxidised zone of zinc ore deposits, typically as botryoidal blue crusts or bladed crystals on limonite gossan. The crystal structure lacks a centre of symmetry — the two ends of each crystal are morphologically different, giving the mineral its name and strong pyroelectric behaviour. The characteristic blue colour comes from trace substitution of copper for zinc.

Formula
Zn₄Si₂O₇(OH)₂·H₂O
System
Orthorhombic
Hardness
4.5 – 5 (Mohs)
Provenance
Mexico (Mapimí), USA, Namibia, China, Iran

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
Zn₄Si₂O₇(OH)₂·H₂O
Crystal System
Orthorhombic
Mohs Hardness
4.5 – 5 (Mohs)
Density
3.4 – 3.5 g/cm³
Refractive Index
1.614 – 1.636
Provenance
Mexico (Mapimí), USA, Namibia, China, Iran
Color Origin
Sky-blue to blue-green from trace copper; also colourless and white

Related Crystals

Stones that share this lattice

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Next in the Atlas

Herkimer Diamond

Water-clear quartz that grew with both ends free.