and its crystals can be large and well-formed

Clarity:  Silky

Product Type: Swiss Blue Topaz

5 on the Mohs scale

Apophyllite and Prehnite Cluster Bombay, India SO24 NWA and its crystals can beApophyllite is more often then not the star attraction and very popular among collectors for its fantastic crystals with their gem like vitreous to pearly luster. Apophyllite almost always forms good crystals of two major types. The favorite crystal habit is the rectangular prism capped by a steep four sided pyramid. A doubly terminated crystal is exceptionally special. The faces of the pyramids are rotated 45 degrees with respect to the prism faces