Scolecite with Calcite Specimen #01 Amazonite vertically striated prismatic crystals

vertically striated prismatic crystals

with a metallic gray color

within a single specimen

these are Botryoidal Purple Chalcedony

and on rare occasions

Scolecite with Calcite Specimen #01 Amazonite vertically striated prismatic crystals2. 5" x 1" x . 5" From Nasik, Maharastra, India Scolecite is a hydrous calcium aluminum silicate, a zeolite mineral with a hardness of 5 to 5. 5. Its crystal system is monoclinic. It occurs as thin, vertically striated prismatic crystals, and in radiating fibrous masses. It can be colorless, white, or yellowish, and it has a vitreous to silky luster. Scolecite forms in cavities in basaltic lavas, as well as cavities in syenites and granites.