Hemimorfita

Hemimorfita de Toral de los Vados (León)

Composition Zinc silicate Zn4Si2O7(OH).H2O Crystal system Rhombic
Hardness (Moh´s)
 5 Density 3,30- 3,50
Refractive index 1,614- 1,636 Birefringence 0,022
Pleocroisme
 none Fluorescence weak
Fracture
 conchoide,uneven I. Dispertion 0,020
Cleavage
 perfect. Streak white
Absortion: not determinated.
  • The name comes due the crystals forms. It´s found in crystals, stalactites, aggregates. It has differents colours: colourless, white, yellow, orange, red, green, blue, violet, brown. Sometimes with a band colours. Transparent to translucent. Sheen vitreous-nacred.
  • Localities in the Península Ibérica: a lot in the north zone: Asturias, Cantabria, Guipúzcoa. Also in Murcia, Teruel, Barcelona, Lleida, Tarragona...
  • Treataments: unknown.
  • Confusions: With Smithsonite, turquoise, crisocola etc.
  • Gemologicals uses: in jewellery in cab.
Gems list
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Hemimorfite cut


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© Montse Bagué and Josep M. Serrano.Text and photos. Reproduction not allowed without permission.