posted on Feb, 12 2013 @ 11:58 AM
The triangle is natural. I have some quartz with triangle markings. From what I recollect, the triangles are where the crystal grows outward. It's
been a long time since I've read about them so I'm not 100% about the growth part.
As for the diamond, it's a shame so much will be wasted to grinding, but I suppose they recover the dust and re-purpose it.