Rounded Diamonds

Now there has been a lot of ill informed spruiking on here about sharp diamonds, so I thought I would post a few photo's.

Some of these are claimed to have only travelled a few miles and ended up in a little creek in Angola, as in the photo below.
They don't look too sharp to me.


Now these Diamonds below are believed to have traveled nearly a couple of thousand kilometres down the Orange and most probably the Vaal and then after being deposoited in the sea's washed another couple of hundred kms up the Namibian coast by storms over a period of millions of years. For a comparision of size the diamond in the middle is about 18 ct.
http://www.diamondfields.com/i/photos/namibia/namibian-marine-diamonds.jpg
Very sharp looking diamonds.


And below is a few more rounded Diamonds from Angola.


Looks like you could use some as marbles doesnt it?