Hemimorfita

TCSS-159

"Galmei" = Hemimorfita + Smithsonita

Zn4(Si2O7)(OH)2.H2O + ZnCO3

https://en.wikipedia.org/wiki/Calamine_(mineral) Calamine is a historic name for an ore of zinc. The name calamine was derived from lapis calaminaris, a Latin corruption of Greek cadmia (καδμία), the old name for zinc ores in general. In the 18th and 19th centuries large ore mines could be found near the German village of Breinigerberg. ..... the two minerals exhibit similar massive or botryoidal external form[1][2] and are not readily distinguished without detailed chemical or physical analysis. 

Localidad: Stolberg cerca de Aachen?

Usos: Mena secundaria de zinc, antes mena importante para formar junto con cobre laton (aleación Cu+Zn) 

TCSS-160 

TCSS-159

Hemimorfita

Zn4(Si2O7)(OH)2.H2O

Color: Blanco amarillento

Dureza:4,5-5

Brillo: Vitreo

Fractura:Irregular

Sistema cristalino: Ortorrombico

Raya: Blanca 

Densidad: 3,47 g/cm3

Minerales asociados: Calcita, limonita

Usos:Mena secundaria de Zinc