Entry № 234
Hemimorphite
Zn₄Si₂O₇(OH)₂·H₂O
Blue crust that grows where zinc meets water.
Chakra
Throat · Heart
Element
Water · Air
Zodiac
Libra · Pisces

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
Next in the Atlas
Herkimer Diamond
Water-clear quartz that grew with both ends free.




