John Divelbiss 2/14/2018 8:33:36 AM |
the acid dissolving method of "dropping" out the diamonds mentioned is similar to how I used to capture used diamonds from diamond drilling bits for re-use. We'd cut the end ring w/segments-diamonds together from the drill pipe and put in two baths, first in sulfuric acid followed by a dip in the hydrochloric acid to get our diamonds back. The re-used diamonds would placed in the new bit mold with a point down to cut again. |
Kormos Bal*zs 2/14/2018 6:17:12 AM |
Thank you! I'm proud of it. |
Stephen Amara 2/14/2018 4:18:43 AM |
Nice!! The faint WID looks like hieroglyph I love the provenance cards!! |
Simon Bartlett 2/14/2018 12:06:56 AM |
Hi - well done on your first contribution! |
|
|