Emerald Cut depth 70%

[chrykies]

All,

My local jeweler is bringing in an EC 1.80 F/VS2 VG/VG with 66% table and 70% depth. Measurements are 8.01*5.83*4.08 with slightly-thick girdle. The cut is supposed to be "very good". Other than adding more weight to the bottom of the stone, does depth of an EC really affect light refraction in any meaningful manner? What should I hope to pay for this stone?

Also, can anyone recommend proportional measurements for step-cut trapezod side stones, or a "preferred range" (x% of length of keystone)? My jeweler has .65tcw which measure 5.6x3.1.

Many thanks.

 

[diagem]

All,

My local jeweler is bringing in an EC 1.80 F/VS2 VG/VG with 66% table and 70% depth. Measurements are 8.01*5.83*4.08 with slightly-thick girdle. The cut is supposed to be "very good". Other than adding more weight to the bottom of the stone, does depth of an EC really affect light refraction in any meaningful manner? What should I hope to pay for this stone?

Also, can anyone recommend proportional measurements for step-cut trapezod side stones, or a "preferred range" (x% of length of keystone)? My jeweler has .65tcw which measure 5.6x3.1.

Many thanks.

Hi, I am afraid numbers dont tell much on step-cut facet designs..., to get objective feedback more info is needed as for example a
pictures and/or scan report.

I have seen plenty of gorgeous EC's in a wider range of depths including depths as high as 80%.
As far as light behaviour in stepcuts..., the possibilities are endless, the angles just need to be applied in harmony. I know, complicated.

The tips on the trap length should be a tad shorter than the length of the straight edge without the corner breaks.

Can you get more info?

 

[Rockdiamond]

Hi chrykies
The bottom of an emerald cut is very important in it's overall look- however IMO, it's not a simple answer.
Sometimes the added depth does indeed add to the cut's beauty- other times not.

In terms of what you should pay- I'd do a search on the PS database- and include Emerald, Pear, Asscher, Marquise and even cushion so you'll have a broader spectrum of stones in a similar weight and color clarity range. 1.80's are not all that common.
Between those shapes, the prices are relatively similar.
I'd say that a B&M jeweler might charge more than internet sellers- and many will feel that the difference is worth it - depending on how large a difference.

Re traps: There's more to look at then just LxW
For example, the angle at which the sides slope, and depth of the corners will make a big difference.
Ask your jeweler to place the stones in a box that will allow you to see the profile.

 

[ChunkyCushionLover]

I agree with Diagem and RD.
The most important information in order of most useful to least would be the following:

1) Video in different lighting
2) .srn or .gem file from a Sarin proportion scan
3) ASET, Idealscope, and Plain photograph Images
4) Partial sarin data report