Scolecite
Poona, India
This specimen measures 16cm x 12cm
Scolecite Ca(Al2Si3O10).3H2O
Tectosilicates, framework alumino silicate, hydrous calcium, isostructural with natrolite and mesolite, zeolite group
Color and Luster: Colorless to white, pink; vitreous to silky
Hardness:5-5.5
Cleavage: Two directions, perfect prismatic cleavage
Fracture: Uneven
Crystals: Monoclinic, prismatic to acicular traprocks
Note: Specimen donated by Victor Yount
Photo by Mary Sutherland
Descriptions taken from
The Audubon Society Field Guide to North American Rocks and Minerals