Hey Storm! Do your magic geometry thing for me?

[glitterata]

Hey, Karl!

Can you do that magic thing you do and tell me how big the table, lgfs, etc are on my new (chipped) transitional cut?

It is a transitional, right? The table looks too big for an OEC to me. But the setting looks early 20s.

Is this shot good enough, or should I try to take some others?

Thanks in advance, Karl--I appreciate it.

 

[strmrdr]

need a shot strait on with less head shadow.

 

[glitterata]

Is this any better? Still too much head shadow, right?

 

[glitterata]

Or this?

 

[strmrdr]

this one almost works...If you can get me something like this with a little less head shadow it would be kewl.

 

[glitterata]

I think I have to wait until tomorrow, when it''s daytime. I just took a bunch of pictures, but they''re all blurry or blown out with flash.

Thanks, though!

 

[strmrdr]

Date: 2/8/2009 7:19:08 PM
Author: glitterata
I think I have to wait until tomorrow, when it''s daytime. I just took a bunch of pictures, but they''re all blurry or blown out with flash.


Thanks, though!

np take a bunch and trow them up that way I can pick and choose.

 

[glitterata]

Okay, I shot a bunch. It''s hard to get them big & clear enough without getting so close I have camera shadow, so they''re a little small and blurry.

 

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number 2

 

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number 3

 

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4

 

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5

 

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6

 

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7

 

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8

 

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9

 

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10

 

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11

 

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12

 

[Upgradable]

Hot dog, Glit!! I can''t help with geometry, but I wanted to say thanks for the nifty eyecandy this morning!!!

 

[strmrdr]

As close as I can get is:
table: 62-64
lgf% 55
crown angle: ~38
pavilion: 40.6 ish

 

[glitterata]

Many thanks!

 

[glitterata]

Interesting. Any idea about the percentage depth? I''d love to try running it through the HCA, just for fun.

 

[strmrdr]

Date: 2/9/2009 12:16:53 PM
Author: glitterata
Many thanks!

Your welcome, its a beautiful diamond.
You should pick up Al''s book if you are into these cuts.
I haven''t figured out yet how to simplify it for PS but "transitional" doesn''t exist the way many think it does.
For example this one is a cross between the Antwerp and the London cut both of which were being cut in circa 1909 right along with oec and oAc.
This one could date anyplace from right after the diamond saw was invented up to the 1940s or even later.
See John''s review of the book here:


http://journal.pricescope.com/Articles/53/1/American-Cut---The-First-100-Years%2c-by-Al-Gilbertson%2c-GG.aspx

 

[strmrdr]

Date: 2/9/2009 12:23:49 PM
Author: glitterata
Interesting. Any idea about the percentage depth? I''d love to try running it through the HCA, just for fun.

no way to tell the girdle thickness with any accuracy.
Besides the hca does not apply because the pavilion mains are the sole light drivers for the table where the hca is based on lgf/mains driven light performance(upcoming article will explain this)

 

[glitterata]

Date: 2/9/2009 12:29:21 PM
Author: strmrdr

Date: 2/9/2009 12:16:53 PM

Author: glitterata

Many thanks!

Your welcome, its a beautiful diamond.

You should pick up Al''s book if you are into these cuts.

I haven''t figured out yet how to simplify it for PS but ''transitional'' doesn''t exist the way many think it does.

For example this one is a cross between the Antwerp and the London cut both of which were being cut in circa 1909 right along with oec and oAc.

This one could date anyplace from right after the diamond saw was invented up to the 1940s or even later.

See John''s review of the book here:



http://journal.pricescope.com/Articles/53/1/American-Cut---The-First-100-Years%2c-by-Al-Gilbertson%2c-GG.aspx

Yes, I''ve been meaning to get that book--it sounds great.

Going from the style of the setting, which I assume is original to this diamond, it''s from the early-mid 1920s. I love the blockiness of the facets.

 

[Upgradable]

Date: 2/9/2009 12:40:27 PM
Author: glitterata

Date: 2/9/2009 12:29:21 PM
Author: strmrdr

Date: 2/9/2009 12:16:53 PM

Author: glitterata

Many thanks!

Your welcome, its a beautiful diamond.

You should pick up Al''s book if you are into these cuts.

I haven''t figured out yet how to simplify it for PS but ''transitional'' doesn''t exist the way many think it does.

For example this one is a cross between the Antwerp and the London cut both of which were being cut in circa 1909 right along with oec and oAc.

This one could date anyplace from right after the diamond saw was invented up to the 1940s or even later.

See John''s review of the book here:



http://journal.pricescope.com/Articles/53/1/American-Cut---The-First-100-Years%2c-by-Al-Gilbertson%2c-GG.aspx

Yes, I''ve been meaning to get that book--it sounds great.

Going from the style of the setting, which I assume is original to this diamond, it''s from the early-mid 1920s. I love the blockiness of the facets.

We ought to start a Pricescope lending library!! That book would get plenty of miles!!