Azurite Azurite can be found in many forms and is often associated with Malachite. As it’s indicates, the colour is light to deep azure blue. Chemical Formular : Cu3(CO3)2(OH)2 Refractive Index : 1.730-1.838 Hardness : 3.5-4 on the Mohs Scale Crystal System :...
Prehnite Prehnite can be found in various forms from botroidal, globular, granular and compact but it is seldom found in crystal form. Colour varies from transparent, white, yellow, yellow-green and it has a pearly lustre. Chemical Formular : 2Si3O10(OH)2 Hardness :...
