Ask-a-Geologist Q&A: Sand Grains
Question: What is the name of sand grains cemented together?
Filed under: earth science, geology, minerals, rocks on September 11th, 2009 | No Comments »
Quartz Crystals are Still a Favorite with Children
Quartz is the most common mineral found in the Earth’s crust.
Filed under: earth science, geology, minerals, rocks on March 20th, 2009 | No Comments »
Quartz – lots of looks, one cool mineral
Quartz is the most common mineral found in the Earth’s crust. Fairly hard, quartz is a 7 on the Mohs hardness scale which has a range from 1 (softest) to 10 (hardest). Quartz, which is sometimes called “Rock Crystal,” is often colorless and has a glassy (shiny) appearance. Quartz has a white streak when rubbed [...]
Filed under: earth science, geology, minerals on December 5th, 2008 | No Comments »
Every heard of a Herkimer Diamond?
OK, today I thought I would talk a little about Herkimer Diamonds. If you know what they are, you’ll probably agree with me that they are so cool!
Sorry! Herkimer Diamonds are not real diamonds. Herkimer Diamonds are actually quartz crystals that are naturally formed with points on both ends of the crystal. These crystals are [...]
Filed under: Uncategorized on June 23rd, 2008 | No Comments »
