1.0 round 1.5 round

[nino77]

What are some specs to look for that make a ring cut good in the 7 8k range? I know about color and clarity looking for size specs table width and all that good stuff. a real quick lesson in what to look for and what to avoid thanks.

 

[tyty333]

Here is the cheat sheet that we usually use around PS although some PSers have tighter or looser
restrictions...you can also use the HCA tool
https://www.pricescope.com/tools/hca

***Cheat Sheet***
Yes there is a cheat sheet, see below. Also be careful when balancing crown and pavilion angles if you are going much over 41 degrees as leakage can occur, you don't want a much shallower crown angle along with a very steep pavilion angle even if the HCA score is reasonable as other undesirable issues can occur.

depth - 60 - 62% - although my personal preference is to allow up to 62.4%
table - 54- 57%
crown angle - 34- 35 degrees
pavilion angle - 40.6- 41 degrees
girdle - avoid extremes, look for thin to slightly thick, thin to medium etc
polish and symmetry - very good and above


note - with crown and pavilion angles at the shallower ends ( CA 34- PA 40.6) and steeper ( CA 35- PA 41) check to make sure these angles complement in that particular diamond - eyeballs, Idealscope, trusted vendor input - check as appropriate!



As the above implies, configurations depend on each other. A little give here can still work with a little take there.

From expert John Pollard.



With that said, here's a "Cliff's Notes" for staying near Tolkowsky/ideal angles with GIA reports (their numbers are rounded): A crown angle of 34.0, 34.5 or 35.0 is usually safe with a 40.8 pavilion angle. If pavilion angle = 40.6 lean toward a 34.5-35.0 crown. If pavilion angle = 41 lean toward a 34.0-34.5 crown.


GIA "EX" in cut is great at its heart, but it ranges a bit wider than some people prefer, particularly in deep combinations (pavilion > 41 with crown > 35).

 

[tyty333]

For 7-8K you are looking in the 1 carat range. If you let us know what your color/clarity specs are we can help you look.

 

[nino77]

just something nice no required specs

 

[renogirl]

You could try searching for stones from trusted PS vendors, such as: Good Old Gold, Brian Gavin, Whiteflash, and James Allen.

With a budget of 7-8k, you can probably get an AGS or GIA certified stone with an "excellent" cut (which is most important), about 1 carat or a little more, in the H/I color range and clarity range of VS2 or SI1...which would be a lovely diamond for an engagement ring.

 

[diamondseeker2006]

Here are a few:

http://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-2673406.htm

http://www.goodoldgold.com/diamond/8378/

http://www.goodoldgold.com/diamond/8426/

http://www.goodoldgold.com/diamond/8758/

http://www.goodoldgold.com/diamond/8704/

http://www.briangavindiamonds.com/diamond/diamond-detail/?product_id=BLAGS-104052029006

http://www.briangavindiamonds.com/diamond/diamond-detail/?product_id=BLAGS-104052029004

 

[Gypsy]

Here are some cheat sheet specifications for round brilliant specs/numbers ( PRINT THIS OUT AND TAKE THIS WITH YOU WHEN SHOPPING IN PERSON):

depth - 60 - 62% - although my personal preference is to allow up to 62.4%
table - 54- 57%
crown angle - 34- 35 degrees
pavilion angle - 40.6- 41 degrees
girdle - avoid extremes, look for thin to slightly thick, thin to medium etc
polish and symmetry - very good and above

note - with crown and pavilion angles at the shallower ends ( CA 34- PA 40.6) and steeper ( CA 35- PA 41) check to make sure these angles complement in that particular diamond - eyeballs, Idealscope, trusted vendor input - check as appropriate!

Also, configurations depend on each other. A little give here can still work with a little take there.

With that said, here''s a "Cliff''s Notes" for staying near Tolkowsky/ideal angles with GIA reports (their numbers are rounded): A crown angle of 34.0, 34.5 or 35.0 is usually safe with a 40.8 pavilion angle. If pavilion angle = 40.6 lean toward a 34.5-35.0 crown. If pavilion angle = 41 lean toward a 34.0-34.5 crown.

GIA "EX" in cut is great at its heart, but it ranges a bit wider than some people prefer, particularly in deep combinations (pavilion > 41 with crown > 35).


ETA; Above copied from Lorelei and John Pollard.