When the gemstones are in a rough state, the gemologist studies the external structure; the host rock and mineral association; and natural and polished color.
42.
A graduate gemologist and master appraiser, Miller first discovered kingfisher blue a few years ago while on a trip to Hong Kong and was enthralled by the color.
43.
Working with his father's most trusted collaborators, the gemologist George Frederick Kunz and John T . Curran, an expert enameler, he began designing jewelry.
44.
The spectroscopic analysis of cut gemstones also allows a gemologist to understand the atomic structure and identify its origin, which is a major factor in valuing a gemstone.
45.
The jeweler's profession was quickly transformed, with the introduction of the " Certified Gemologist " professional designation and the legitimization of gemology as a recognized science.
46.
Gemologist Michael Steenrod in Colorado Springs has appraised the pearl at $ 60, 000, 000 ( 1982 ) and $ 93, 000, 000 ( 2007 ).
47.
The stone was sent to Paris where American gemologist George Kunz, working for Tiffany & Co ., cut it into a 128.54-carat cushion.
48.
After the Grecos returned from their cruise, Michael Greco had the ring appraised, but discovered that finding a gemologist with no ties to any store was not so easy.
49.
"So sultans, shahs and maharajahs were the principal market, " said Fred Ward, a gemologist and author of the book " Emeralds ."
50.
"They're not the stones you see advertised in print or on radio, " said John Reid, a certified gemologist at LeeBrant Jewelers in Atlanta.
