We have a nice selection of specialty crystals for the avid collector. Choose from aragonite clusters, fluorite octahedrons, twinned staurolite, grossular garnet, gypsum roses, ulexite, iceland spar calcite, galena, quartz and herkimer diamond quartz.
Filed under: Geology / Earth Science, Minerals on December 12th, 2011 | No Comments »
Staurolite is a silicate mineral which occurs in metamorphic rocks and is often found with the minerals kyanite and garnet. Staurolite is a 7 to 7.5 on the Mohs Hardness Scale which has a range from 1 (softest) to 10 (hardest), has a glassy to resinous luster and a colorless streak. Prismatic crystals of staurolite are common and often found twinned.
Filed under: Geology / Earth Science, Minerals on February 5th, 2010 | No Comments »
Staurolite is a unique mineral which often forms cross-shaped twinned crystals. While staurolite is generally brown it has a colorless to grey streak and it is about as hard as quartz (7 to 7.5 on Mohs hardness scale). The name staurolite comes from the Greek word stauros which means “cross.” Staurolite forms in metamorphic rocks [...]
Filed under: Uncategorized on June 26th, 2008 | No Comments »
