The only diamond cutter I would recommend for a 5 to 6 carat diamond
is Dirk Verbiest, his contact info is at the bottom of my post. He is
the finest diamond cutter I have ever worked with (I’ve worked with
several), he can almost perform magic. He is from Belgium and was
raised in a diamond cutting family, so he’s done it almost his entire
life. He is exceptionally good at retaining weight and estimating
weight loss, I’ve never known him to miss. He will let you know
exactly what the options are, and how each option might affect the
value, although diamond valuation is not what he does normally. He
has cut many custom shapes for me and they always match and fit
I’m not sure what he would charge you, but he is also pretty
reasonable in his pricing. He charged me a dollar a point for a
diamond he polished a chip out of this week (two day turn-around),
but it was only 0.72ct. Lost 2 points, and saved a nice pear shaped
diamond with a very ugly chip in the girdle and a little tiny one on
the other side. He removed some burning from a bunch of thirds my
brother smoked due to a cast-in-place burn-out error a couple of
years ago, and lost less than a point from each one, again at around
a dollar a point with a two or three day turn-around. He gets a
little more for larger stones (like maybe $1.50 a point?), when they
need repolishing on both the crown and pavilion, but the savings in
weight and the increase in brilliance he can produce more than pays
for a little extra cost.
I would not send a diamond from my family to anyone else.
Others have recommended Stuller, I’m not sure I would concur for a 5
or 6 carat stone, and as RD says, they are certainly not inexpensive.
I love Stuller and order from them practically daily, but for a
diamond like your mother’s, go with someone that does only diamond
cutting and nothing else. Their livelihood depends on their skills,
unlike others that do it as an additional service that won’t break
them if they’re not that successful or good at it.
No affiliation with Dirk. I just like to share when I find good
products and good people - that’s what Orchid is for, right? Dirk is
good people and really knows his trade.
PO Box 62216
Durham, NC 27715-2216
All the best,