Thursday, January 24, 2008
Clouds lighted up at sunset in the backdrop of silhouette of tree and hills in pawagarh in gujarat, india.
RB with simple 16 facet pavilion and 2-tier step crown. Cut from a mystery boule -- it turned out to be syn corundum.
This is a beautiful stone and reflects ocre/yellow around the rim and some red flashes about the centre
This colorless synthetic diamond may pose a bit of a challenge to the African warlords and the De Beers cartel.
It is grown one carbon atom at a time in a customized CVD (chemical vapor deposition) process. A perfect seed crystal starts the process (over time, Apollo has enlarged the “seed” to wafer scale). The seed is placed in a microwave chamber with a hydrogen + methane plasma heated to 1300 degrees that rains reactive carbon down onto the seed, growing ~1 carat per 12 hours.
Although the manufacturing process should produce diamonds with fewer flaws than mined diamonds, this early diamond has some defects that I could only see with the macro lens (inclusions and a crown notch. I’m just happy to have a version with personality. =)
It is 8mm wide by 2mm deep. Right now the 2mm depth is the critical manufacturing limit, and it affects the ability to do a standard brilliant diamond cut. So this one is flat and wide. But they can make sheets of diamond with this thickness. Imagine a diamond window pane, or semiconductor wafers that can run at 81 Ghz without elaborate cooling.