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Asking for any guidance on price

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BDR

Rough_Rock
Joined
Jan 10, 2003
Messages
6
I asked a question about a diamond and price last week, I have more complete information now and I would appreciate any guidance you could provide. Thanks in advance for your help.

Round Brilliant
6.36-6.43 x 3.99 mm
1.01 Carat
Depth 62.3%
Table 59%
Girdle - Thin to slightly thick faceted
Cutlet - none
Polish - Good
Symmetry - Very Good
Clarity VS2
Color - G
Fluorescence - None

Comments:
Additional clound are not shown

I examined this stone under a loop and I was unable to see the inclusions. Can you give me an idea on price? Thanks
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
Hi BDR,

Re: price. You might want to run a price comparison from Pricescope front page for similar diamonds.

You'll find that several internet vendors list similar stones for about $5,000 +/- $300.

Are you aware that this diamond is a bit deep for the table size and have smaller spread i.e. diameter smaller than well cut 1-carat diamond?
 

Mara

Super_Ideal_Rock
Joined
Oct 30, 2002
Messages
31,003
Take a few minutes and run a price search yourself on Pricescope. Go to the homepage (www.pricescope.com) and on the left slightly halfway down you will see a search engine feature. Plug in the stats of your stone and see what the engine brings back for you. It will show you diamonds that are currently being sold by vendors online. While you are not looking to purchase online, this will give you an idea of the pricing you should be looking for as 'competitive' for online. If you are working with a good B&M, they may be able to match or at least come very close to online pricing. There are MANY diamonds on Pricescope's search engine, so don't put too large of a range in when you search, try searching for 1.01 stones G, VS2 in your depth and table range and see what comes up.

Also if you can get crown and pavilion angle on the stone, you can run the stone through the HCA (link under Cut Advisor at top of page) to get an idea of how this stone might score for fire, scintillation, brilliance and spread. Anything under 2.0 is excellent, but you can read more at the Cut Advisor link to get details.

Hope this helps some. Also I know that some of the other forum members have suggested that 6.5mm diameter may be a nice aim for a 1.0c carat stone.
 

Mara

Super_Ideal_Rock
Joined
Oct 30, 2002
Messages
31,003
Leo how can you tell that from the info given? I want to know! :)
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
Mara, ----------------
Leo how can you tell that from the info given? I want to know! :)
---------------- First of all, the diameter is smaller than 6.5mm

Secondly, well cut stone (crown/pavilion) with larger table should have smaller depth. Imagine a cone (=crown). If you cut the top closer to the base (=girdle) you'll get larger table but the height should be smaller.

Smaller tables can be ok with deeper stones.

I just used to these numbers. :)
 

Mara

Super_Ideal_Rock
Joined
Oct 30, 2002
Messages
31,003
Very good..thanks for the clarification. So a well cut 1c should be 6.5mm diameter and around 4.0 for depth or less? I have heard the 6.5mm diameter but not depth before..

:wink2:
 

texas_26

Rough_Rock
Joined
Jan 10, 2003
Messages
24
I think he is referring to the depth %. As the table goes up into the 59 range, to still be a good cut, the depth percent needs to come down to that range as well. So with a table of 59, your depth % should be close to that as well in order to maintain a good looking diamond. If that were the case with this stone(which it isn't because the depth is 62.3), I would guess the diameter would be ~6.6 because the crown would flatten out, and the spread would get larger.

Leonid, please correct me if I am wrong.
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
Texas, you're right.

In order to maintain good crown/pavilion angle relationship, total depth should diminish when table gets larger.

Usually diamonds with larger table have bigger diameter but this stone have smaller diameter with a bit larger table.

I tried to fit the proportions with DiamCalc. I succeeded with very steep crown.

bnr1.gif
 

Mara

Super_Ideal_Rock
Joined
Oct 30, 2002
Messages
31,003
With a 59% table diamond, it seems as though the depth would be better set at under 59%..more around 57% but then you get a more shallow stone. I thought that I had seen a few well performing stones listed on here at some point that had a table of 59% and a larger depth of around 61%-63%, but maybe I was mistaken. Though I know that there are many combos that can create a well-cut diamond..so it seems as though there is no die-hard 'rule of thumb' when it comes to table/depth %?

My mm comment was due to the fact that I have heard 6.5mm is a good diameter for a 1c stone. So what is the preferred depth to the 6.5mm 1c stone? 4.0?
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
If crown and pavilion angles would be 34.5 and 40.75 degrees and table size = 59%, 1.01-carat stone would have 6.51mm in diameter and 60.2% depth (assuming medium girdle and pointed culet).

bnr3.gif
 

BDR

Rough_Rock
Joined
Jan 10, 2003
Messages
6
Thanks for all of your help. I also have a follow-up question. I called my jeweler and he said that crown and pavilion where just jargon for table and depth. Is this correct? If not, how do I find the actual crown and pavilion angles? Thanks for all of your help.
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
----------------
I called my jeweler and he said that crown and pavilion where just jargon for table and depth. Is this correct? If not, how do I find the actual crown and pavilion angles?
---------------- No, it is not correct. Here is the diagram:



. ----------------
If not, how do I find the actual crown and pavilion angles?
----------------
You can ask to run Sarin or Megascope measurements for the stone.[/u]
 

trichrome

Shiny_Rock
Joined
Dec 9, 2002
Messages
397
Here is a story:

A couple of years ago I went talking with a local jeweler
about some of his diamonds.. For him, measuring the "pavilion depth"
was the same thing as measuring the total height of the stone...

Well..... it looks like that your jeweller is also not knowing his stuff.
A good advice would be not to let him. Remember, if he really
doesnt know his stuff, take it at your advantage and bargain the
price as much as you can....

Best regards,
Trichrome......... The Canadian Mounted Gem Specialist...:))
 

wndrful

Rough_Rock
Joined
Jun 19, 2002
Messages
40
Well, apart than worrying about the diamond being too deep and other important cut measurements. Let me say another thing.

Once the diamond is in the ring, its diameter is the one that makes it look big or small not the carat weight. Thats why people tend to buy shallow and wide diamond.

Your 1.01 carat diamond is more deeper than wider thus it will look only as big as 0.93-0.95 carat ideal cut diamond.

When I was shopping for a diamond, I learnt (it took time some for me) to remember approx diameter range of an H&A ideal cut diamond for the carat size I was looking for. After that if anyone showed me a stone with much bigger or smaller diameter, I imm knew something was fishy (no pun intended!)

I suggest you ask your jeweler to show you an ideal cut 1 carat diamond and then compare the two together. Next to each other in the shop also outside on the street or in normal lighting. I bet you will see a big difference in the sparkle and also in size!

Keep is in the know.
 
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