[null and void]

but silicates line up in neat crystal structures only when they are warmed to 1,300 degrees Fahrenheit - temperatures reached at around the orbit of Mercury - and then cooled.

Uh huh, and diamonds can only be formed under high pressure.

(Unless you are growing them commercially in a low pressure chemical vapor deposition reactor)...

[Bernard Marx]

(Unless you are growing them commercially in a low pressure chemical vapor deposition reactor)...

True. Please help me out with the crystal structure of CVD diamonds. Are they single-crystal cubic?