Showing posts with label Gems & Gemology. Show all posts
Showing posts with label Gems & Gemology. Show all posts
Thursday, June 12, 2025

Enormous South Sea Cultured Pearl With Filled And Partially Hollow Structure

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The GIA has published an insightful report on the huge South Sea cultured pearl in the Spring issue of Gems & Gemology, GIA's quarte...
Wednesday, November 23, 2022

Breyite Inclusion In Diamond

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Raman spectroscopy was used to identify the inclusion as breyite. Useful link: https://www.gia.edu/gems-gemology/fall-2022-microworld-breyit...
Monday, November 21, 2022

Rare Kashmir Star Sapphire

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Untreated Kashmir sapphires are rare. Useful link: https://www.gia.edu/gems-gemology/fall-2022-lab-notes-rare-kashmir-star-sapphire
Sunday, November 20, 2022

A Synthetic Moissanite Presented As Natural Diamond Rough

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Consumers beware. It always happens. If you have doubts, always consult a reputed gem testing laboratories like the GIA. Useful link: https:...

Sapphire Beneath The Rich Black Soil Of Muling, Northeastern China

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Colored stone miners, dealers and gemologists must read. Many thanks to Gems & Gemology for the insightful report. Useful link: https://...
Wednesday, June 15, 2022

Cuprite And Malachite In Agate From The Yanyuan Region, Sichuan

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Take a look at two kinds of copper-bearing inclusions in agate from Yanyuan. Useful link: https://www.gia.edu/gems-gemology/spring-2022-gemn...
Wednesday, June 01, 2022

Hematite Crystals In Diamond

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This rare inclusion offers a glimpse into the long and unique journey each diamond takes to the earth's surface. Useful link: https://ww...
Tuesday, May 31, 2022

Hillocks On Beryl

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Take a look at a well-formed gem-quality aquamarine crystal with unique hexagonal growth hillocks. Many thanks to GIA gemologists. Useful li...
Monday, May 30, 2022

Rare Blue Apatite Inclusion In Smoky Quartz

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Take a look at an hexagonal apatite inclusion with interference colors in smoky quartz. Useful link: https://www.gia.edu/gems-gemology/sprin...
Saturday, May 28, 2022

Old Techniques Reimagined: Maki-e Pearls

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Maki-e is an ancient Japanese lacquer technique that translates to sprinkled picture and is said to have originated more than 1200 years ago...
Thursday, May 26, 2022

Sugar/Heat-Treated Opal

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Opals are treated either to conceal the cracks or to improve the appearance. If doubtful, ask questions. Useful links: https://www.gia.edu/g...
Tuesday, May 24, 2022

Dyed Fluorite

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Fluorites are dyed to improve color or clarity. If doubtful, consumers should consult a reputed gem testing laboratory like the GIA before p...
Saturday, May 07, 2022

The Type IIb De Beers Cullinan Blue Diamond

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Insightful report. Must read.  Useful link: https://www.gia.edu/gia-news-research/de-beers-cullinan-blue-diamond
Monday, March 07, 2022

Historic Sales Of Pink And Blue Argyle Diamonds

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An insightful review. Useful link: https://www.gia.edu/gems-gemology/winter-2021-gemnews-historic-sales-pink-and-blue-diamonds-argyle-mine
Sunday, March 06, 2022

Floating Flower Inclusions In Aventurine Quartz Bangle

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Take a look. Gem identification is always challenging. If doubtful always consult a reputed gem testing laboratory like the GIA.  Useful lin...

Imitation Candy Agate

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The imitation candy agate could be defined as a new type of epoxy-filled chalcedony which shows similar colored cores to natural candy agate...
Saturday, March 05, 2022

Blue Zircon Malawi

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A new source of blue zircon from Malawi is a welcome addition to the colored gemstone trade. Useful link: https://www.gia.edu/gems-gemology/...

Biogenic Carbon In Pink Corundum

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Take a look at the biogenic carbon in pink corundum in the form of graphite from southern west Greenland. Inclusion collectors should take n...

Banded Turquoise

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Take a look at the banded turquoise from Zhushan county, Hubei Province, China. Useful link: https://www.gia.edu/gems-gemology/winter-2021-g...
Friday, March 04, 2022

Colored Stones From The Deep

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I love colored stones and like to learn the geology behind the discovery of colored stones in a variety of circumstances. The birth of color...