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The claim that IIb diamonds (ones with boron inclusions) are the only type of natural blue diamonds is un-sourced and likely incorrect. A segment on Beyond 2000 covering Australian diamond mines stated that testing of blue diamonds found there contained no boron and that the blue colour was instead due to deuterium inclusions. 121.79.9.89 (talk) 10:29, 26 August 2009 (UTC)[reply]

Yes, it is incorrect, and I'll fix that in a minute. Argyle diamonds are blue gray without boron. The origin of color there is uncertain. They are rich in hydrogen and nitrogen, but there is no proof that hydrogen is the cause, only speculations. Materialscientist (talk) 10:36, 26 August 2009 (UTC)[reply]

List_of_thermal_conductivities say (with refs) the different types have very different thermal conductivity - and it would be useful to compare to that of moissanite diamond simulant. - Rod57 (talk) 20:23, 7 December 2021 (UTC)[reply]