Goosecreekite
Image: Robert M. Lavinsky (CC BY-SA 3.0)
Mineral NameGoosecreekite
Chemical FormulaCaAl₂Si₆O₁₆·5H₂O
Mohs Hardness4.5
Crystal Systemmonoclinic
Lustervitreous
Streak Colorwhite
Cleavagegood on {001}
Fractureuneven to subconchoidal
Specific Gravity2.26
Colorswhite, colorless, pale yellow, pinkish
Transparencytransparent to translucent
Type LocalityJalgaon District, Maharashtra, India
Mineral GroupSilicates (Zeolite group)
Usescollector
Associated Mineralsquartz, apophyllite, stilbite, heulandite
Rarityuncommon
Description
The image displays white to colorless, blocky or tabular crystals of goosecreekite, often intergrown with or forming on a matrix of clear, prismatic quartz crystals.
Geological Context
Goosecreekite is a rare zeolite mineral typically found in basaltic vugs and cavities, formed by hydrothermal alteration of volcanic rocks, often alongside other zeolites and secondary minerals.
