Goosecreekite Locality: Pandulena Hills, Nasik District , Maharashtra , India ( Locality at mindat.org ) A 5 cm bowtie of white, lustrous goosecreekite sits perched on tan, lustrous, stilbite crystals, which reach .5 cm across. The dramatic perch of the goosecreekite makes this a superb display piece. This specimen displays itself beautifully without any assistance on a sawn bottom . 8.2 x 5.6 x 2 cm — Photo: Robert M. Lavinsky · CC BY-SA 3.0
Goosecreekite
Goosecreekite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca(Si₆Al₂)O₁₆·5H₂O.
It crystallizes in the monoclinic crystal system (space group P2_1).
Key properties: Mohs hardness 4.5; specific gravity 2.21; White streak; Vitreous to pearly on crystal faces luster; optically biaxial.
IMA symbol Gck, IMA status: approved, named in 1980.
A late-stage mineral in vugs and fractures in a Triassic diabase (Goose Creek quarry, Virginia, USA); in cavities in basalt (Nasik, India).
It is found associated with Prehnite, actinolite, chlorite, epidote, babingtonite, quartz, titanite, stilbite, albite, apophyllite (Goose Creek quarry, Virginia, USA); quartz (Nasik.
The name refers to the initially described occurrence in the Goose Creek quarry, Virginia, USA.