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Need help with measurements

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Girls-best-friend

Shiny_Rock
Joined
Jan 21, 2003
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136
Could someone tell me what the scale is for converting carat to mm.

Some sites I see they say 8mm or 5mm what is that in carats. Would you be so kind at to start with 1/2 carat and go up to 6 carats (including half sizes for each). Thank you.
 

Mara

Super_Ideal_Rock
Joined
Oct 30, 2002
Messages
31,003
Run a search on the internet. You'll find much info.

Off the top of my head..6mm is around a .80c, 1c is around 6.5mm, 1.25c is around 7.15mm, 1.35 is around 7.25mm. I don't know much more beyond that.

Also keep in mind that the mm does not correspond well to ctw because it really depends on the CUT of the stone. A very well cut 1c will be 6.5mm, but a horribly deep cut 1c may have a diameter of around 6.20mm or 6.30mm or 6.40mm depending on the quality of the cut. So it's hard to correspond with a scale, unless you are talking a specific type of stone.

 

Mara

Super_Ideal_Rock
Joined
Oct 30, 2002
Messages
31,003
Yay on Rich for coming through. I'll take the 14mm please.

 

Girls-best-friend

Shiny_Rock
Joined
Jan 21, 2003
Messages
136
Sorry one more thing. Are those sizes the same for the marquise, pear and princess shape. My three favorites
 

trichrome

Shiny_Rock
Joined
Dec 9, 2002
Messages
397
Rich,

My jeweller (female) is wearing without any problems a 10ct RB........

What a babe!!!!!!!!!!!!!!!!!!!!!!!


Trichrome.
 

Girls-best-friend

Shiny_Rock
Joined
Jan 21, 2003
Messages
136
Never mind guys I found a site that gives the measurements for the other shapes. Thanks rich for helping out.
 

Mara

Super_Ideal_Rock
Joined
Oct 30, 2002
Messages
31,003
WOW Tri...now that is my fantasy!!!
I'd have such great arm muscles from carrying my hand around. Haaa.
 
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