Diamond is the hardest mineral, being a 10 on the Mohs hardness scale. Diamonds are found in igneous rocks called Kimberlites, which are formed deep underground (between 90 and 280 miles below the surface of the Earth). This photo shows cores of kimberlite rock from a drilling event. Rock cores are stored in core boxes for examination.
Filed under: Geology / Earth Science, Minerals, Rocks on April 7th, 2011 | No Comments »
Volcanic Breccia is a unique extrusive igneous rock that is has large, angular fragments stuck in a fine-grained rock background. This rock forms during an eruption when when rock fragments are plucked off of the inside wall of the volcano and are stuck in the lava, or when rock fragments are picked up from the ground by flowing lava.
Filed under: Geology / Earth Science, Rocks on February 7th, 2011 | No Comments »
This has to be the most-asked question we receive here at Mini Me Geology. Question: What are the hollow ball-like objects, such as quartz, which are found in sedimentary rocks?
Filed under: Geology / Earth Science, Minerals, Rocks on June 22nd, 2009 | No Comments »
Igneous rocks are often used as building materials and in the production of household items.
Filed under: Geology / Earth Science, Rocks on March 12th, 2009 | No Comments »
