Friedrich Mohs harder. This became the basis of the hardness scale developed by Mohs. The hardest mineral, diamond was given a value of 10 and softer minerals such as talc were given the very low value of 1 (unity). Other minerals were given intermediate values, depending on their ability to scratch another mineral in the scale. Thus gypsum was given the value 2 because it will scratch talc crystals, and calcite the value 3 because it will scratch gypsum. Minerals are also now classified by chemical characteristics, but the physical properties are still useful in field examination. In 1812, Mohs became a
Softer, Softest Hole's performance on "MTV Unplugged" on Valentine's Day 1995, Love introduced the song as "[being] about the girl that always smelled like pee in your class" and also claimed it was autobiographical and not about former MTV producer, Tabatha Soren. Despite being credited on record as a collective authorship by all members of Hole, according to Broadcast Music Incorporated's website, the authors of the song are only Eric Erlandson and Courtney Love. A promotional music video was never recorded for "Softer, Softest", however, the version of the song performed at "MTV Unplugged" in 1995 was used a music video though