1.   In the process diamond crystals were work-hardened under extreme heat and pressure to give their faces abrasion resistance without bonding them together.

2.   Most natural diamond crystals are black mixtures of diamond and graphite, and are used as abrasives.

3.   SI Diamond has a patented process for depositing diamond crystals on other materials, including glass.

4.   The carbon pairs then condense onto a surface of silicon dioxide, forming tiny diamond crystals a few billionths of a meter in size.