Roses from the Littleton War Memorial Rose Garden
Thursday, January 24, 2008
silhouettes at sunset
Clouds lighted up at sunset in the backdrop of silhouette of tree and hills in pawagarh in gujarat, india.
syn sapphire
RB with simple 16 facet pavilion and 2-tier step crown. Cut from a mystery boule -- it turned out to be syn corundum.
Citrine Nigeria 29,3ct
Precious Gem.
This is a beautiful stone and reflects ocre/yellow around the rim and some red flashes about the centre
22.24ct 19.07x15.98mm Cushion Hessonite Garnet From Sri Lanka
Cushion Hessonite Garnet From Sri Lanka
Diamond Age
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.
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