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Sunday, March 15, 2009

[Diamond Age]


This colorless synthetic diamond from Apollo Diamond may pose a bit of a challenge to the African warlords and the De Beers cartel.

This diamond has the same atomic structure as a mined diamond, and is therefore optically, chemically and physically identical. But Apollo plans to get the cost down to $10/carat with high volume manufacturing.

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.

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