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Gemstones 250x250

The Mineral goosecreekite

Goosecreekite In Vug with Heulandite

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.

Chemical Formula

CaAl2Si6O16 · 5(H2O)

Color

Colorless, white

Crystal System

Monoclinic

Properties

Streak
Colorless
Hardness
4
Transparency
Transparent to translucent
Specific Gravity
2.3 - 2.5
Luster
Vitreous, pearly
Cleavage
1,1
Fracture
Uneven
Tenacity
Brittle

Crystal Habits

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.

Additional Information

Composition
Hydrous calcium aluminum silicate
In Group
Silicates; Tectosilicates; Zeolite Group
Striking Features
Formation habits and localities.
Environment
In air vesicles in volcanic basalt and in diabase veins.
Rock Type
Igneous

Uses

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.

Common Mineral Associations

Quartz, Calcite, Heulandite, Stilbite, Apophyllite, Prehnite

goosecreekite Photos



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