Got Diamond Questions?
Our community of diamond experts are here to provide answers

Engagement Ring Help Please! Marquise cut

Recommended Posts

Hi everyone. My fiancé recently purchased me a ring sight unseen from a local jewelery store. It is a marquise halo cut diamond that is 1.32 carats. The ring measures  9.84 x 5.77 x 3.72 mm. After doing some research on marquise rings I found that typically a 1.3 diamond would be a little longer (around 11mm) and be the same width and depth as the ring my fiancé purchased. With all this being said, I began to wonder if the ring he purchased is indeed 1.32 carats. I’m wondering is it possible for the ring to be that carat size with the measurements listed? Any information anyone can provide is greatly appreciated. 

Share this post

Link to post
Share on other sites

Hello Ellie, welcome to Diamond Review, and congratulations on your engagement!

You are right that a marquise stone with those dimensions is unlikely to be 1.32 ct (unless it's very rounded, almost an oval). However, it's possible that the 1.32 ct refers to the "total carat weight" of the ring, i.e. the centre stone plus the halo stones. Without seeing any documentation , that would be my guess: a typical marquise with those dimensions would weigh about 1.15 - 1.25 ct, leaving 0.10 to 0.15 ct approximately for the halo stones.

Whether that's been explained to your fiancé is a different matter entirely.

Davide - Specialised Consumer Information and Assistance,
Diamonds by Lauren (

Share this post

Link to post
Share on other sites

Thanks for your response. I called the jeweler directly and they assured me it’s 1.32 for the center stone but I’m still feeling uneasy about the item. I’ll try taking the diamond to another store for an opinion.

Share this post

Link to post
Share on other sites

It's possible.  There are quite a few variables here, not the least of which is the accuracy of those measurements but also things like the girdle thickness and shape of the pavilion. If you can arrange it, by the way, get it checked out by a real appraiser, not a competitive jeweler. There are some significant conflicts of interest at play here.

Is there any paperwork, like a lab report, on that stone?  The jeweler almost certainly would have provided it if they had one but your fiance may not have understood it's importance, even in a blind purchase like you describe. That will list the weight and even bad labs are reliable on this point.  The same holds for dimensions. Accurately measuring to 1/100 of a millimeter takes decent and calibrated equipment. Labs will have this. Diligent appraisers will have it. Most jewelry stores don't. 

Where are you?

Edited by denverappraiser

Neil Beaty



There's never a crowd when you go that extra mile.

Professional Appraisals in Denver

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now