What is Hemimorphite?


Hemimorphite is a zinc silicate mineral that is often found in oxidized zinc ore deposits. It’s primarily found in the United States, Mexico, and Namibia. Hemimorphite is often used as a gemstone and is popular for its sky-blue to greenish-blue color.

Hemimorphite is a captivating gemstone that comes in shades of sky-blue to greenish-blue. Its unique appearance and color make it a popular choice for jewelry and decorative items, especially beads and pendants.

Gemstone Properties

Chemical ClassificationInorganic - Silicate
ColorTypically blue to greenish-blue, but can also be colorless, white, or brown.
LusterVitreous to silky.
TransparencyTransparent to translucent.
OccurrenceNamibia, Mexico, and the USA (especially Arizona).
FormationTypically found in the oxidized zones of zinc ore deposits.
DiaphaneityTransparent to translucent
Mohs Hardness4.5 to 5
Specific Gravity3.4 - 3.5
Diagnostic PropertiesBlue to greenish-blue, often botryoidal.
Chemical CompositionZn4Si2O7(OH)2·H2O
PleochroismNot observed in hemimorphite.
Crystal SystemOrthorhombic
Optical PropertiesBiaxial (+)
Refractive Index1.614 - 1.636
2V angleMeasured: 50° to 65°
DispersionNot typically noted for its dispersion.