Tridymite
Cerro San Cristóbal, Pachuca Municipality, Hidalgo, Mexico
Small colorless crystals of trydymite to 0.1 cm are scattered within vugs throughout a 7.1 x 4.4 x 3.2 cm matrix. From the type locality. Ex Steve Pullman collection; previous label from Schortmann's Minerals dating this one back to the pre-1950's.
© Weinrich Minerals, Inc.