Friday, March 22, 2019
Home Tags Limestone

Tag: limestone

Pistachio green epidote

Eye on Epidote

By Jim Brace-Thompson Calcium aluminum iron sorosilicate Ca2Al2(Fe3+, Al)Si3O12(OH) Epidote is one terrific silicate mineral for display. It produces well-formed prismatic crystals that are long, slender, striated...
Anglesite vug

Socorro’s Mineral Cornucopia

Story and Photos by Mark Leatherman Anytime a rockhounding club has the privilege of being able to go underground as part of an extended field...
Serpentinite bluffs

Fun Facts Saturday: Geology and the Golden Gate Bridge

Editor's Note: This is a new column wherein we explore a history-making moment and its connection to geology. By Antoinette Rahn Eighty-six years ago today (Jan....
Quartz var. amethyst, Piedra Parada

De Colores: Las Vigas Veracruz and Amatitlan

Editor's Note: This is one of 10 Mexican locales recognized for mineral production. View the rest of the list as part of an article...