SILICATES; TECTOSILICATES; ZEOLITE GROUP · MONOCLINIC
Goosecreekite
CaAl2Si6O16 · 5(H2O)
Hardness
4
Streak
Colorless
Spec. Gravity
2.3–2.5
System
Monoclinic
About
Goosecreekite is a rare and coveted member of the zeolite group. It is a relatively new mineral, only being recognized by the IMA as a distinct mineral species in 1980. Goosecreekite is named after its type locality at the New Goose Creek Quarry in Leesburg, Virginia.
Crystal Forms & Aggregates
Crystals are in rounded prismatic groups, and in globular or hemispherical, ball-like
formations. Crystals are usually in wedge-shaped crystals. Rounded or globular forms usually have individually recognizable crystals on the rounded edges, which are often spiky or grainy.
Goosecreekite is a rare mineral that is highly desired by collectors. Its only practical use is as a high-end mineral for collectors, especially zeolite collectors.
Noteworthy Localities
The most significant locality for Goosecreekite is Jalgaon, Maharashtra, India. Other localities in the state of Mahrashtra are Nasik, Pune (Poona), and Mumbai. In the U.S., micro crystals of Goosecreekite were found in the New Goose Creek quarry, Leesburg, Loudoun County, Virginia.
