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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Fri Apr 10, 2020 3:02 pm 
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I see that this thread is a bit old but as someone mentioned earlier in this thread Heart Cut's seems rather difficult to obtain.

Anyone willing to take on the task and make a GemCad/GemRay of the cut shown in the picture?

Preferably for R.I. 1.52 (critical angle: 41.2°) to suit a 40+ carat.


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original.jpg
original.jpg [ 373.28 KiB | Viewed 1393 times ]
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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Sat Apr 11, 2020 8:17 pm 
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LapidaryGems wrote:
Anyone willing to take on the task and make a GemCad/GemRay of the cut shown in the picture?

Preferably for R.I. 1.52 (critical angle: 41.2°) to suit a 40+ carat.

The image is a match for Jeff Graham's Rose Heart with a carved notch, but that definitely can't be done in RI=1.52...

Attaching a barion pavilion will change the pattern, and the lower refractive index also means you won't get the same sparkle that render shows, is that okay?


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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Sat Apr 11, 2020 8:58 pm 
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Shifter55 wrote:
LapidaryGems wrote:
Anyone willing to take on the task and make a GemCad/GemRay of the cut shown in the picture?

Preferably for R.I. 1.52 (critical angle: 41.2°) to suit a 40+ carat.

The image is a match for Jeff Graham's Rose Heart with a carved notch, but that definitely can't be done in RI=1.52...

Attaching a barion pavilion will change the pattern, and the lower refractive index also means you won't get the same sparkle that render shows, is that okay?


I think that might work. The design would be for a Feldspar of light color. If it is possible it would be nice if the cut were able to make the material look slightly more saturated also.


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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Sun Apr 12, 2020 5:05 am 
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Here's my first attempt, the girdle changes thickness slightly to minimise need for barion facets. If someone else can figure out how to improve this for larger stones that would be great.


Attachments:
BarionRoseHeart.gif
BarionRoseHeart.gif [ 12.55 KiB | Viewed 1332 times ]
RoseHeart-Spades.pdf [5.23 KiB]
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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Sun Apr 12, 2020 9:20 am 
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Shifter55 wrote:
Here's my first attempt, the girdle changes thickness slightly to minimise need for barion facets. If someone else can figure out how to improve this for larger stones that would be great.


Great start! Thanks! GemCad is new to me, I haven't gotten the hang of it just yet.


Last edited by LapidaryGems on Sun Apr 12, 2020 12:22 pm, edited 1 time in total.

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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Sun Apr 12, 2020 11:21 am 
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Here is a light color feldspar/Oregon sunstone I cut in a heart recently.

10.69 x 10.77 mm, 3.68 ct.

I modified the pattern somewhat, but it started out as Norm Steele's "CAM-BRILL Heart 64".


Attachments:
File comment: CAM-BRILL Heart 64, DataVue #10.021
CAM-BRILL Heart 64.JPG
CAM-BRILL Heart 64.JPG [ 90.33 KiB | Viewed 1317 times ]
File comment: CAM-BRILL Heart modified MHA pattern
CAM-BRILL Heart 64 modified.JPG
CAM-BRILL Heart 64 modified.JPG [ 101.87 KiB | Viewed 1317 times ]
2191202b (600x450).jpg
2191202b (600x450).jpg [ 117.17 KiB | Viewed 1319 times ]

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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Thu Mar 11, 2021 6:56 pm 
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GemCAD design request:
An elongated version of the OMNI Egg Brilliant (by Robert Strickland) with Old Mine Cut Pavilion/Crown.

For R.I: 1.62-1.64 (Tourmaline)
L/W: 1.50


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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Fri Mar 12, 2021 2:36 am 
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1912001 wrote:
GemCAD design request:
An elongated version of the OMNI Egg Brilliant (by Robert Strickland) with Old Mine Cut Pavilion/Crown.

For R.I: 1.62-1.64 (Tourmaline)
L/W: 1.50

If possible, could you post some images of the type of pavilion you want for the design? While sharp cushion cuts are often refered to as Old Mine, most surviving examples are irregular rounds.


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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Fri Mar 12, 2021 9:48 am 
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Shifter55 wrote:
1912001 wrote:
GemCAD design request:
An elongated version of the OMNI Egg Brilliant (by Robert Strickland) with Old Mine Cut Pavilion/Crown.

For R.I: 1.62-1.64 (Tourmaline)
L/W: 1.50

If possible, could you post some images of the type of pavilion you want for the design? While sharp cushion cuts are often refered to as Old Mine, most surviving examples are irregular rounds.


Pavilion similar to this I guess, designed in a manner that won't lead to windowing or lack of light reflection in Tourmaline.

Attachment:
oldmine.jpg
oldmine.jpg [ 39.42 KiB | Viewed 1004 times ]

Attachment:
Dresden.jpg
Dresden.jpg [ 11.77 KiB | Viewed 1004 times ]


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 Post subject: Re: From the GPU - post your GemCAD design requests here!
PostPosted: Wed Mar 17, 2021 10:18 am 
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bump


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