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 »
Amethyst is the purple form of the mineral quartz. Fairly hard, amethyst is a 7 on the Mohs hardness scale. Amethyst is always purple and has a shiny appearance.
Filed under: Geology / Earth Science, Jewelry & Home, Minerals on January 10th, 2011 | No Comments »
Aquamarine is a pale blue form of the mineral beryl. Aquamarine crystals can occur in such rocks as granites and pegmatites. These beautiful gemstones have a glassy luster (shine) and are either translucent or transparent. These properties make aquamarine a prized stone for all types of jewelry.
Filed under: Minerals on March 3rd, 2010 | 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 »
This unique mineral is often called TV Stone or TV Rock because of its fiber optic properties. Place a sample on a picture or text and watch the image transmit from beneath the mineral to the top. Ulexite is composed is white, silky fibers and is very soft.
Filed under: Geology / Earth Science, Minerals, Rocks on December 1st, 2009 | No Comments »
We have something for everyone on your gift list! This week, save 10% off of your entire order with coupon code ROCK10. Just enter the coupon code when you checkout!
Filed under: Geology / Earth Science, Minerals, Rocks on November 19th, 2009 | No Comments »
The November birthstone is topaz. Topaz is a unique gemstone which comes in a huge varitey of colors such as orange-yellow, colorless, light blue, pink, brown and green.
Filed under: Geology / Earth Science, Minerals, Rocks on November 13th, 2009 | No Comments »
A new shipment of wonderful grossular garnet crystals have arrived. Beautiful grossular garnet mineral from Mexico is one of six varieties of garnet. Each single crystal shows the natural dodecahedral form of the garnet group. These samples, from Mexico, are approximately 0.75 to 1 inch in size.
Filed under: Geology / Earth Science, Minerals, Rocks on September 10th, 2009 | No Comments »
Sapphires are a blue form of the mineral corundum. When corundum is red, it is called a ruby.
Filed under: Geology / Earth Science, Minerals, Rocks on September 9th, 2009 | No Comments »
Aragonite is a white to colorless minerals which has shades of red, yellow, orange, or brown. Aragonite is made of calcium carbonate, like calcite, and will fizz in an acid. Nice specimens of aragonite can be found in Spain, Morroco, Englad, France, Mexico and the United States, to name a few places.
Filed under: Geology / Earth Science, Minerals on July 22nd, 2009 | No Comments »
