Allotropes of carbon dispersion of light of diamond make it useful for both industrial applications and jewelry. Diamond is the hardest known natural mineral. This makes it an excellent abrasive and makes it hold polish and luster extremely well. No known naturally occurring substance can cut (or even scratch) a diamond, except another diamond. The market for industrial-grade diamonds operates much differently from its gem-grade counterpart. Industrial diamonds are valued mostly for their hardness and heat conductivity, making many of the gemological characteristics of diamond, including clarity and color, mostly irrelevant. This helps explain why 80% of mined diamonds (equal to about 100
The Hardest Part (Coldplay song) Smiths meets REM." David Cheal of "The Daily Telegraph" noted, "...'The Hardest Part' is lovely, straightforward, instantly accessible pop-rock". The music video for "The Hardest Part" was shot on 3 March 2006 in St. Petersburg, Florida. The video uses footage from the television series "Attitudes", a series aired on the Lifetime television network, from 1985–1991. The video is digitally enhanced to appear as though Coldplay is performing the music alongside the act appearing on stage. American actress Linda Dano, who played Felicia Gallant on the US soap opera "Another World", is also featured. The dancers on the stage are 84-year-old