A streak test is one tool that geologists use to determine the identity of a mineral. The “streak” is the color of the mineral in powdered form. Some minerals will have a streak color that is the same as the outer color of the mineral while others will have a streak color that is very different from the outer color.
Filed under: Geology / Earth Science, Minerals, Rocks on September 17th, 2009 | No Comments »
Question: What is the name of sand grains cemented together?
Filed under: Geology / Earth Science, Minerals, Rocks on September 11th, 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 »
Question: How could mineral hardness be used to tell quartzite (shown right) from marble (shown left)? Answer: I don’t know that hardness would be a good test since both of these rocks have undergone metamorphism.
Filed under: Geology / Earth Science, Rocks on July 17th, 2009 | 1 Comment »
Question: What term for metamorphic rock with banded texture?
Filed under: Geology / Earth Science, Rocks on July 8th, 2009 | No Comments »
The first kit in our new Rock Detectives line is now available. Take your children on a Mineral Mission with this fantastic kit. Your Mineral Mission kit comes complete with six cool mineral samples, a hand magnifier and a CD with over 25 pages of mineral information, sample identification activities, puzzles, coloring pages, and experiments.
Filed under: Geology / Earth Science, Minerals, Rocks on July 3rd, 2009 | No Comments »
Shop now and save 20% off your entire order! Use coupon code ROCK20 at check to grab your discount.
Filed under: Geology / Earth Science, Minerals, Rocks on June 24th, 2009 | No Comments »
Kids will learn about some of the Earth’s most beautiful and interesting rocks in Mini Me Geology’s Sedimentary Rock collection.
Filed under: Geology / Earth Science, Rocks on June 17th, 2009 | No Comments »
Arkose is a beautiful sedimentary rock that is typically gray, pink or red. This coarse-grained rock forms when igneous rocks break apart and the pieces travel to a river, lake or ocean.
Filed under: Geology / Earth Science, Rocks on June 11th, 2009 | No Comments »
A geyser is a hot spring which ejects hot water a vapors through a crack in the rock.
Filed under: Geology / Earth Science, Minerals, Rocks on March 19th, 2009 | 1 Comment »
