P.T?

[lf115]

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!

 

[chrono]

It's you again, right?
[URL='https://www.pricescope.com/community/threads/paraiba-tourmaline-question.216896/']https://www.pricescope.com/community/threads/paraiba-tourmaline-question.216896/[/URL]

 

[lf115]

No, not me. Can you help me with some information about recutting this piece?

 

[chrono]

Reach out to Jerry Newman. I foresee major material loss, which in turn means valuation decrease.

 

[lf115]

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]

I just had some tourmaline cut by Michael Edgett at the The Gem Shoppe. Nice work and very reasonable.

 

[Sphene]

could we have a photo taken further away to appreciate the size of the stone your recutting

 

[chrono]

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]

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]

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]

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?

 

[GregS]

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]

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]

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]

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]

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]

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]

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]

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

 

[minousbijoux]

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.