Okenite Geode from India

Okenite geode from Deccan Traps, India.
 
 Rare mineral !
 Museum piece, unique !
 Ideal for connoisseurs looking for excellence , this Okenite Geode will bring satisfaction.
 It deserves its place in the most refined collections or the most prestigious showcases .
 
 Origin: Deccan Traps, Bombay Mine, Mumbai District, India.
 Size: 12cm by 9cm by 8.5cm
 Chemical formula: Ca3[Si6O15] 6(H2O)
 Crystal System: Triclinic
 Hardness Mohs scale: 4.50 to 5.00
 Definition: Okenite is a mineral species from the silicate group composed of hydrated calcium silicate. The crystals can reach up to 4 cm3. The okenite is silky white to pearly in color, there are specimens of bright green, blue, mauve colors, given as coming from India or China which are artificially colored pieces. Okenite is transformed into wollastonite by heating.