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Round Stones, Points and Measurements

P: 3/9/2004 6:15:34 PM
Appreciative-of-expertise Cut Rock Total Posts: 163 Last Post: 9/20/2004 Member Since: 10/18/2003	Hi, all! I need some guidance regarding finding a chart or information that will associate the size of a round stone (Diameter) to the size in carats. I am searching for round stones for a channel setting that are to be: 4mm, 3.5mm and 3mm across the table. What does this, in general, associate with carat size? Thanks! "Appreciative-of-expertise"
Posted: 3/9/2004 6:15:34 PM

There are 5 replies to this message. There are 5 replies on this page.

P: 3/9/2004 6:38:27 PM
Patty Ideal Rock Total Posts: 4,031 Last Post: 6/4/2008 Member Since: 12/7/2003	I tried to post a conversion chart here but couldn't get it to post. A 4mm stone is about 1/4 ct. or 23-25 points. A 3 1/2mm diamond would be about 16 or 17 points and a 3mm stone is about 10 or 11 points.
Posted: 3/9/2004 6:38:27 PM

P: 3/10/2004 3:29:57 AM
Pyramid Ideal Rock Total Posts: 2,914 Last Post: 11/11/2009 Member Since: 11/10/2002	Just came across this on the Zales site. Here is the link http://www.zales.com/productknowledge.aspx?pid=38#Diamond%20Science
Posted: 3/10/2004 3:29:57 AM

P: 3/11/2004 2:53:07 PM
Superidealist Ideal Rock Total Posts: 655 Last Post: 8/23/2006 Member Since: 9/10/2003	To find the approximate carat weight of a well-cut diamond given its diameter, use the following formula: Carat weight = (Diameter / 6.5)^3 D Riley
Posted: 3/11/2004 2:53:07 PM

P: 3/11/2004 3:18:16 PM
Mara Ideal Rock Total Posts: 27,924 Last Post: 11/24/2009 Member Since: 10/30/2002	I recommend WhiteFlash's ACA Melee for your smaller stones...they carry them as small as .01c For the larger 4mm ones you would probably need to pay a little more since they AGS cert anything over .20c which means more $$....but for the .16 (I think they carry .15) and .10 you would just buy using their melee pricing. ________________________________ "Insanity: doing the same thing over and over again and expecting different results." -Albert Einstein
Posted: 3/11/2004 3:18:16 PM

P: 3/11/2004 5:24:24 PM
Giangi Ideal Rock Total Posts: 2,530 Last Post: 10/29/2006 Member Since: 1/23/2003	You are looking at aboout respectively 0.23ct (4mm), 0.15ct(3.5mm) and 0.10ct (3mm). I too would suggest ACA melee. They seem to be marvelous. _____________ Omnia Mea Mecum Porto. Giangi
Posted: 3/11/2004 5:24:24 PM

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