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 Thing (album) "Aria". A remix of the song, featuring Gianna Nannini, also appears on the album. The album's title track and first single, "The Hardest Thing", achieved great chart success in Macedonia, Bosnia, Croatia and Serbia. The second single, "My Little One", featuring Proeski's nephew, was released later in 2008. Recording for the album took place in Ireland, Sweden, England and Jamaica. Video footage of the recording sessions were later assembled into a music video for "The Hardest Thing". The track list was confirmed by several media outlets on the day of release. The posthumously released songs "Out of Control" and "Hold