The hardness of diamond contributes to its suitability as a gemstone. This page was last edited on 20 May , at These include laser drilling to remove inclusions, application of sealants to fill cracks, treatments to improve a white diamond's color grade, and treatments to give fancy color to a white diamond.

The structure gradually changes into sp 2 C above this temperature. Synthetic Diamond: Depending on the elemental abundances, one can look at the decay of rubidium to strontium , samarium to neodymium , uranium to lead , argon to argon , or rhenium to osmium.

In Radovic, Ljubisa R. The reason this looks like a giant orgy, is because this was at a local strip club, in Rio. All three of the diamond-bearing rocks kimberlite, lamproite and lamprophyre lack certain minerals melilite and kalsilite that are incompatible with diamond formation.