Analcime
Hardness: 5-5,5 Color: colorless, white, grey, yellowish, pink, greenish Formula: Na(AlSi2O6).H2O Crystal System: cubic (polymorph) René Just Haüy, french mineralogist in 1797 named analcime after the greek analkimos (weak) word, due to the weak electrostatic properties of the mineral. Analcime belongs to the zeolite group and a relatively common mineral. Principally it can be found...