Mineral necessarily constant for all sides, which is a function of its structure; crystallographic weakness renders some directions softer than others. An example of this property exists in kyanite, which has a Mohs hardness of 5½ parallel to [001] but 7 parallel to [100]. The most common scale of measurement is the ordinal Mohs hardness scale. Defined by ten indicators, a mineral with a higher index scratches those below it. The scale ranges from talc, a phyllosilicate, to diamond, a carbon polymorph that is the hardest natural material. The scale is provided below: Lustre indicates how light reflects from the mineral's
Softer, Softest the song developed into its final form in early 1993 when the name "Softer, Softest" was being used. The first known studio version of "Softer, Softest" was recorded on 21 January 1993 at BMG Ariola Ltda in Rio de Janeiro, Brazil. Featuring Love on lead guitar and vocals, recently recruited drummer Patty Schemel and Love's husband Kurt Cobain of Nirvana on bass, the trio recorded the song, alongside "I Think That I Would Die" (then known as "Baby") "She Walks on Me", "Miss World" and "Closing Time", during breaks in Nirvana's session. Sound engineer Craig Montgomery stated that the songs