Identify the Ideal by the Eye of the Diamond
By Michael Cowing |
Here is a surefire way to recognize Ideal cut diamonds at a glance. Learn to look for the “eye of ...
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Ideal Cut
By Michael Cowing |
The Ideal Brilliant Cut: Its Beginnings to Today Introduction Since its beginnings in the early 20th century to the present ...
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What is the American Ideal Cut?
By Michael Cowing |
Question: What exactly is the American Ideal? Was it Americans who refined the cutting/proportioning process? The American Ideal Cut Ideal ...
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The Central Ideal
By Michael Cowing |
Have you heard of the ‘American Ideal’ or ‘Tolkowsky Ideal’ in diamond cutting? How about the ‘Morse Ideal’? Michael Cowing explains ...
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The Accord in Round Brilliant Diamond Cutting
By Michael Cowing |
Photo realistic image of today’s Ideal cut diamond Photo realistic image of the Ideal with pavilion cut in the antique ...
Read More Over Grading of Blue Fluorescent Diamonds Summary
By Michael Cowing |
Twenty-five years ago GIA published the results of a human experiment in the observation of diamonds with various amounts of ...
Read More Over Grading of Blue Fluorescent Diamonds Revisited
By Michael Cowing |
Nineteen years ago GIA published the results of a human experiment in the observation of diamonds with various amounts of ...
Read More The Overgrading of Blue-Fluorescent Diamonds
By Michael Cowing |
Michael D. Cowing FGA AGA Certified Gem Laboratory email: michaelgem@gmail.com Abstract: Decades after the establishment in the mid-twentieth century of ultraviolet-free ...
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A Place for CZ Masters in Diamond Colour Grading
By Michael Cowing |
Figure 2. Complete set of GIA graded diamond masters from E through M. Over the last 20 years and despite ...
Read More Diamond Design and Light Performance 101
By Michael Cowing |
Diamond Design and Light Performance Analysis 101 . A brilliant cut diamond’s appearance is a kaleidoscopic pattern of many internal ...
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