shape
carat
color
clarity

P.T?

lf115

Rough_Rock
Joined
Nov 6, 2015
Messages
4
Hello everyone,
I'm new to this forum. I have this large PT and I want to recut and set it with melee diamonds. Is this possible? If so, where can I get it done? I would appreciate any information. Thanks!

_695.jpeg

_696.jpeg
 

lf115

Rough_Rock
Joined
Nov 6, 2015
Messages
4
No, not me. Can you help me with some information about recutting this piece?
 

chrono

Super_Ideal_Rock
Premium
Joined
Apr 22, 2004
Messages
38,364
Reach out to Jerry Newman. I foresee major material loss, which in turn means valuation decrease.
 

lf115

Rough_Rock
Joined
Nov 6, 2015
Messages
4
Chrono|1446844663|3946423 said:
Reach out to Jerry Newman. I foresee major material loss, which in turn means valuation decrease.
Thanks for the recommendation. Nonetheless, I wouldn't mind losing material much because I really just prefer a more recent cut.
 

QuantumStuff

Rough_Rock
Joined
Sep 6, 2015
Messages
28
I just had some tourmaline cut by Michael Edgett at the The Gem Shoppe. Nice work and very reasonable.
 

Sphene

Brilliant_Rock
Joined
Jan 4, 2015
Messages
666
could we have a photo taken further away to appreciate the size of the stone your recutting
 

chrono

Super_Ideal_Rock
Premium
Joined
Apr 22, 2004
Messages
38,364
The stone is very large based on its relative size to the prongs, which is the reason why I thought it was that other poster again with his topaz and 14K setting. My guess is that the stone might be at least 5 carats.
 

MJO

Brilliant_Rock
Trade
Joined
Nov 3, 2004
Messages
861
The inclusions I see are normal in tourmaline. I believe it is tourmaline and looks like Nigerian material. Not the cleanest but very nice color especially on the side, blue color. What are the measurements? Especially depth?
 

PrecisionGem

Ideal_Rock
Trade
Joined
Jul 27, 2004
Messages
2,030
The stone looks to have no pavilion, so it's very flat and thin for the diameter. If your intent is more traditional faceted type stone, then it would make the most sense to saw the stone into several pieces so that the depth to diameter makes more sense.
 

Michael_E

Brilliant_Rock
Trade
Joined
Nov 19, 2003
Messages
1,290
PrecisionGem|1446938257|3946805 said:
The stone looks to have no pavilion,


Take a look at that second picture Gene, that stone has an adequate pavilion, it's just mounted upside down. Very clever eh? :lol:
 

GregS

Brilliant_Rock
Joined
Sep 5, 2012
Messages
719
I don't know, but I suspect you'd lose some face up size during faceting and a considerable amount of weight. Very pretty color though.
 

lf115

Rough_Rock
Joined
Nov 6, 2015
Messages
4
PrecisionGem|1446938257|3946805 said:
The stone looks to have no pavilion, so it's very flat and thin for the diameter. If your intent is more traditional faceted type stone, then it would make the most sense to saw the stone into several pieces so that the depth to diameter makes more sense.
The dimensions are about 29 x 23 mm and the depth is around 15 mm.
I appreciate all the comments!
 

tankyu

Rough_Rock
Joined
Aug 20, 2015
Messages
16
If I've calculated correctly, that stone is less than a seventh of a carat (depending on specific cut and density of your tourmaline) and very shallow. Are you sure you'd be okay with it getting even smaller?
 

Lovinggems

Ideal_Rock
Joined
Mar 28, 2009
Messages
3,622
tankyu|1447215626|3948086 said:
If I've calculated correctly, that stone is less than a seventh of a carat (depending on specific cut and density of your tourmaline) and very shallow. Are you sure you'd be okay with it getting even smaller?

It's 2x3cm, surely it is larger than 1/7 ct?
 

katharath

Ideal_Rock
Joined
Mar 5, 2013
Messages
2,850
tankyu|1447215626|3948086 said:
If I've calculated correctly, that stone is less than a seventh of a carat (depending on specific cut and density of your tourmaline) and very shallow. Are you sure you'd be okay with it getting even smaller?


It's 29 mm x 23 mm x 15 mm. That's a stone of significant carat weight, in the double digits (I would assume. And I'm sure someone else can be more specific than that).
 

Jajabis

Rough_Rock
Joined
Sep 8, 2015
Messages
46
tankyu|1447215626|3948086 said:
If I've calculated correctly, that stone is less than a seventh of a carat (depending on specific cut and density of your tourmaline) and very shallow. Are you sure you'd be okay with it getting even smaller?

Huh?
29mm = Length
23mm = Width
15mm = Height
Volume of a rectangle = LWH
Volume = 10005mm^3 converted to cm^3 = 10cm^3 ... Taking whole numbers
Specific density of tourmaline is about 3g/cm^3 "3.03-3.25" ^^^^^^^^^

D=m/V
D x V = M
10x3=30grams
1gram=5 carats, so that is about 150 carats. I'd say dimensions have a 50% error + the fact we don't know how it's exactly cut.

90carts x .50 = 75 carats.


If you want to be lazy, i googled this real quick.....
http://www.csgnetwork.com/caratwtcalc.html

Which say's it's 69.11 carats with a rectangle cushion. Pretty close to the math with the 50% error in dimensions lol.
 

chrono

Super_Ideal_Rock
Premium
Joined
Apr 22, 2004
Messages
38,364
That's even larger than I initially guessed. It's almost like wearing a piece of rough and I've not heard of a > 70 ct paraiba tourmaline. I hope you aren't offended if I ask whether you have verified the stone to be what you think it is.
 

Lisa Loves Shiny

Ideal_Rock
Premium
Joined
Nov 1, 2007
Messages
4,742

minousbijoux

Super_Ideal_Rock
Premium
Joined
Aug 5, 2010
Messages
12,824
LisaRN|1447285636|3948447 said:
I love this conversion site because it takes in account the specific gravity of the gemstone. For this stone the estimated weight is 69.11 carats.

http://www.csgnetwork.com/caratwtcalc.html

Lisa: Thank you so much for the link to this site - its one I have not seen before and find it quite helpful.
 
Be a part of the community Get 3 HCA Results
Top