(Closed) Carat to mm conversion question

posted 3 years ago in Rings
Post # 2
Hostess
9737 posts
Buzzing Beekeeper
  • Wedding: March 2014 - Chicago, IL

Cushions do face up smaller than rounds – the cut is deeper. You can put the measurements into diamdb.com and it will tell you if your stone is cut too deep, or if it’s proportions are good for the carat weight. 

Post # 3
Member
67 posts
Worker bee

Since the carat is based on weight, it might have more depth then width with that cut.. I know hardly anything when it comes to this though…

Post # 6
Hostess
9737 posts
Buzzing Beekeeper
  • Wedding: March 2014 - Chicago, IL

realhousebeesofwb :  According to the website I posted, if the diamond is 5×5 mm, it’s cut is inadequate and it does not look it’s weight. For reference, I put in a .92 ct round as a means of comparison.

Post # 7
Hostess
9737 posts
Buzzing Beekeeper
  • Wedding: March 2014 - Chicago, IL

realhousebeesofwb :  Sorry I must have been making my post when you replied to me 🙂 I think you’re right – it says that the depth is ok. Do you have the paperwork with all the true dimensions listed? The website will “guess” the depth based on carat weight if you don’t fill that section out.

Post # 9
Member
753 posts
Busy bee
  • Wedding: September 2014

It’s normal n for people to think carat = size on hand. The same .92 carat weight could be 5mm or 6.3 mm (a huge difference really even though it seems small). 

But also how are you measuring? I ordered chalipers for $20 off amazon they are hard to use even though it looks easy. The same CZ I get readings of 6.95-7.15 depending on the angel of the end when I measure.So if your just using a ruler you maybe off by .1-.3, that seems like nothing, but it can make a big difference on diamb. 

Honestly it sounds like your man went for weight not size and got a deep stone. But if it sparkles well I would leave it alone. He may have thought he was doing so well by getting such a “big” stone  

Post # 11
Member
241 posts
Helper bee
  • Wedding: June 1989

Congratulations on your engagement!  Would love to see a picture of your ring! 

Post # 12
Member
753 posts
Busy bee
  • Wedding: September 2014

realhousebeesofwb :  I’m sure it’s weight is .92 and he didn’t get riped off being sold a .78 and told/charged like it was a .92. It’s just cut really deep.  If you want to have some fun seeing how many different MM there is to the same weight got to James Allen and pick a weight (.75 or 1.2) and look at how different the MM’s are for the same shape and same weight. 

And yep calipers are hard to use, they must be absolutely parellel. If I tilt the ends just a little when getting a reading it’s all sorts of off.  (The stone is 5x7mm officaly, but I keep getting 7.05 lol) 

 

Edit: You may consider that you were “ripped off” by paying for a stone that is .92 but only looks .70-.80 . He paied for weight that is “hidden”. But personally if you like the stone it may cause more issues then it’s worth over a few hundred bucks. 

  • This reply was modified 3 years, 4 months ago by  NEAM2014. Reason: add

The topic ‘Carat to mm conversion question’ is closed to new replies.

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