Scolecite
Scolecite
Published: June 2014
Modified: August 2022
Scolecite is a fascinating zeolite mineral. Its name is derived from the Greek word, skolex, meaning worm because under a flame, scolecite curls up like a worm. It shares the unusual properties of piezoelectricity and pyroelectricity with other gem minerals like tourmaline.
General Information
Common Name
Scolecite
Species
Scolecite
Transparency
Transparent - Opaque
Dispersion
Strength: Strong Fire
Refractive Index
1.509-1.525
Birefringence
0.007-0.012
Optic Character
Biaxial
Optic Sign
Negative
Polariscope Reaction
Aggregate (AGG), Doubly Refractive (DR)
Fluorescence
SWUV: Inert to weak yellow
LWUV: Inert to weak bluish white
LWUV: Inert to weak bluish white
Pleochroism
Unobservable
Hardness
5-5.5
Streak
White
Specific Gravity
2.210-2.290
Toughness
Poor
Luster
Vitreous, Silky
Fracture
Uneven
Cleavage
Perfect, in two directions
Chemical Formula
CaAl2Si3O10.3H2O
Crystal System
Monoclinic
Chemistry Classification
Silicate
Scolecite Colors
-
Brown -
Colorless -
Green -
Orange -
Pink -
Red -
White
Countries of Origin
Unknown; India
Care
Soft and brittle, so be mindful of scratching. Not suitable for most jewelry uses.