Showing posts with label Gem Treatments. Show all posts
Showing posts with label Gem Treatments. Show all posts
Saturday, December 02, 2023

Translucent Ruby Filled With Zinc Glass

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Consumers beware. Many thanks to GIA Carlsbad and Gems & Gemology for sharing the insightful report. Useful link: https://www.gia.edu/ge...

Nebula Inclusion In Ruby Beryllium-Diffused To Heal Fractures

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For a well-trained lab gemologist beryllium-diffused corundums are easily recognizable by its characteristic color and inclusions. Many than...
Monday, November 13, 2023

Yellow Sapphire: Natural, Heat-Treated, Beryllium-Diffused, And Synthetic

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A must read for practicing gemologists, heat-treaters, and colored stone dealers. Many thanks to Gems & Gemology team for the insightful...
Saturday, August 19, 2023

Characteristics Of Treated Rubies From Greenland

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Most colored stones are treated to improve color or clarity and Greenland ruby is no exception. For a trained gemologists inclusion features...
Monday, June 26, 2023

Heated Purplish Pink Sapphire From Ilakaka (Madagascar) With Colored Monazite Inclusions

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A must read for a practicing gemologist. Many thanks to Gems & Gemology researchers for sharing the insightful report. Useful link: http...
Saturday, June 10, 2023

Ruby With Interesting Synthetic Overgrowth

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Practicing gemologists must read Nicole Ahline's (GIA, Carlsbad, California) report on ruby treatment. Proper interpretation is importan...
Sunday, February 19, 2023

Color Modification Of Spinel By Nickel (Ni) Diffusion

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The new nickel diffusion treated spinel will add more headaches to the already confused gem dealers, gem testing laboratories and the cluele...
Monday, February 06, 2023

Red-Dyed Spodumene Imitating Ruby

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Buyer beware. If doubtful always consult a reputed gem testing laboratory like the GIA. Useful link: https://www.gia.edu/gems-gemology/winte...
Thursday, February 02, 2023

Low-Temperature Heat Treatment Experiments On Burmese Ruby

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Insightful report by E. Billie Hughes and Wim Vertriest. Must read. Useful link: https://www.gia.edu/gems-gemology/winter-2022-burmese-ruby
Monday, January 30, 2023

Composition And Spectral Characteristics Of Porcelain-Treated Turquoise

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Turquoise are frequently treated to improve color, clarity and visual appearance. If doubtful, always consult with a reputed gem testing lab...
Tuesday, September 06, 2022

Yellow Sapphires With Unstable Color

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Treatments are commonly seen in yellow sapphires to improve color. Some are detectable, while others aren't. If doubtful, always consult...
Thursday, September 01, 2022

Fracture-Filled Emerald with Mysterious Filler Patterns

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Visually interesting. The pattern could be interpreted in a variety of ways. Hats off to Ungkhana Atikarnsakul. Useful link: https://www.gia...
Thursday, June 16, 2022

Amber Filled With Epoxy Resin

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Amber is usually treated to improve color, clarity or visual appearance. Buyers beware. If doubtful, ask questions to avoid costly mistakes....
Wednesday, June 15, 2022

Characteristics Of Amber With Irradiation Treatment

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Amber is irradiated, heat treated or dyed to improve color, clarity or overall visual appearance. Consumers who have no knowledge of treatme...
Tuesday, June 14, 2022

Barite-Calcite Composite As Imitation Wulanhua Turquoise From Hubei Province, China

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Visual observation may not be enough to distinguish these beads from true Wulanhua turquoise, Raman spectroscopy and EDXRF analysis are nece...
Thursday, June 09, 2022

Unusual Repair Of A Natural Emerald

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This kind of fracture filling repair is unusual for natural emerald. As always, if doubtful, ask questions. Useful link: https://www.gia.edu...
Monday, June 06, 2022

Repaired Grandidierite

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Take a look at a fracture-filled Grandidierite to improve the appearance. Useful link: https://www.gia.edu/gems-gemology/spring-2022-lab-not...
Saturday, June 04, 2022

Apatite Oiling: Before And After

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Colored stones are treated either to improve color or clarity. Consumers beware. Useful link: https://www.gia.edu/gems-gemology/spring-2022-...
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...