CLASS: Tectosilicate (Feldspar – Plagioclase) . . .CHEMICAL FORMULA: (Na, Ca) (Al(Al, Si)Si2O8 . . . CRYSTAL SYSTEM: Triclinic
CRYSTAL FORM: pinacoid, tabular or pseudo-prismatic crystals
COLOR: colorless, white, green, blue, yellow, grey, pink, red, brown… It is IRIDISCENT
PHYSICAL PROPERTIES: hard (6/6,5 Mohs), light (2,69/2,72 g/cm3), perfect exfoliation on the basal pinacoid and less perfect on the lateral, translucent/opaque, vitreous luster, soluble in hydrochloric acid.
CURIOSITIES: It is related to the improvement of the power of seduction.