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Goosecreekite In Vug with Heulandite

The Mineral goosecreekite




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)
Composition Hydrous calcium aluminum silicate
Color Colorless, white
Streak Colorless
Hardness 4
Crystal System Monoclinic
Crystal Forms
and 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.
Transparency Transparent to translucent
Specific Gravity 2.3 - 2.5
Luster Vitreous, pearly
Cleavage 1,1
Fracture Uneven
Tenacity Brittle
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
Popularity (1-4) 3
Prevalence (1-3) 3
Demand (1-3) 1


Goosecreekite AUCTIONS

POLYMORPHS
Epistilbite


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
 
ADDITIONAL RESOURCES
 
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