(Closed) 1.25 or 1.5ct on exactly size 5

posted 5 years ago in Rings
Post # 2
1701 posts
Bumble bee
  • Wedding: July 2009

Here’s some general diamond advice.

***The single most important thing to determine a diamond’s performance is cut. Cut is king, as they say on PS. The cut should be ‘excellent’ on the GIA report. Don’t hesitate to look at H,I,J color stones. You may be surprised. For clarity, look at VS1, SI1, SI2. You want a gemologist to tell you it is ‘eye clean’ at 8-10 inches. Period. If it is eye-clean, that is all you want. 

~Stick with a center stone that is GIA, HRD Labs, AGS or GCAL certified. NOT EGL, IGI, GSI, PGS, not a ‘branded’ stone, not joe-schmoe store’s ‘exclusive’, or the store manager’s recommendation. GIA is the toughest grader, if the diamond seller did not send the stone to them, they knew it would grade lower than they wanted to label it and you are paying for the higher rating.

~Being GIA graded is not enough to tell you it will perform well. For that, it is about the cut. Rounded are the easiest to buy. 

~There are no deal in diamonds, unless you are given one for free or know how to find them at pawn shops. B&M have about a 40% mark-up, online have about a 15% markup from reputable sellers like BlueNile, JamesAllen, IDJ, GoodOldGold, etc.  

~From Gypsy at PS for Round Brilliants

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!

From expert John Pollard. As the above implies, 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).




Post # 3
57 posts
Worker bee
  • Wedding: December 2014

I am size 4.5-4.6 and my e-ring is 1.19 ct.  I think it’s pretty small so I would go for 1.5 ct if no budget concerns.  (Excellent cut/GIA)

Post # 4
961 posts
Busy bee

My ring finger is 4.5 but my ring is a size 5. My center stone is 1.9. So I’ll say go for 1.5

Post # 5
1582 posts
Bumble bee
  • Wedding: October 2016

I’m a size 5, but I swell to a 5.5. My diamond is 1.5, and I think it’s perfect! 🙂


Post # 6
1015 posts
Bumble bee
  • Wedding: April 2008

So you total ct weight or center stone ? Well I have a 1.03 center stone withe a TCW of 1.70 on a size 5 cushion brilliant cut though .. Hope it still helps .. 





Post # 7
1641 posts
Bumble bee

1.45 (very close) Moissanite on a size 5:

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