Consumers beware. Many thanks to GIA Carlsbad and Gems & Gemology for sharing the insightful report.
Showing posts with label Gem Treatments. Show all posts
Showing posts with label Gem Treatments. Show all posts
Saturday, December 02, 2023
Nebula Inclusion In Ruby Beryllium-Diffused To Heal Fractures
For a well-trained lab gemologist beryllium-diffused corundums are easily recognizable by its characteristic color and inclusions. Many thanks to GIA Carlbad team and Gems & Gemology for sharing the insightful report.
Monday, November 13, 2023
Yellow Sapphire: Natural, Heat-Treated, Beryllium-Diffused, And Synthetic
A must read for practicing gemologists, heat-treaters, and colored stone dealers. Many thanks to Gems & Gemology team for the insightful report.
Saturday, August 19, 2023
Characteristics Of Treated Rubies From Greenland
Most colored stones are treated to improve color or clarity and Greenland ruby is no exception. For a trained gemologists inclusion features and color are good indicators. Many thanks to Greenland Ruby and gemologists at GIA Bangkok for sharing the insightful report.
Monday, June 26, 2023
Heated Purplish Pink Sapphire From Ilakaka (Madagascar) With Colored Monazite Inclusions
A must read for a practicing gemologist. Many thanks to Gems & Gemology researchers for sharing the insightful report.
Saturday, June 10, 2023
Ruby With Interesting Synthetic Overgrowth
Practicing gemologists must read Nicole Ahline's (GIA, Carlsbad, California) report on ruby treatment. Proper interpretation is important when it comes to treatments in rubies.
Sunday, February 19, 2023
Color Modification Of Spinel By Nickel (Ni) Diffusion
The new nickel diffusion treated spinel will add more headaches to the already confused gem dealers, gem testing laboratories and the clueless consumers.
Monday, February 06, 2023
Red-Dyed Spodumene Imitating Ruby
Buyer beware. If doubtful always consult a reputed gem testing laboratory like the GIA.
Thursday, February 02, 2023
Low-Temperature Heat Treatment Experiments On Burmese Ruby
Insightful report by E. Billie Hughes and Wim Vertriest. Must read.
Monday, January 30, 2023
Composition And Spectral Characteristics Of Porcelain-Treated Turquoise
Turquoise are frequently treated to improve color, clarity and visual appearance. If doubtful, always consult with a reputed gem testing laboratory like the GIA. Must read.
Tuesday, September 06, 2022
Yellow Sapphires With Unstable Color
Treatments are commonly seen in yellow sapphires to improve color. Some are detectable, while others aren't. If doubtful, always consult a reputed gem testing laboratory.
Thursday, September 01, 2022
Fracture-Filled Emerald with Mysterious Filler Patterns
Visually interesting. The pattern could be interpreted in a variety of ways. Hats off to Ungkhana Atikarnsakul.
Thursday, June 16, 2022
Amber Filled With Epoxy Resin
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
Amber is irradiated, heat treated or dyed to improve color, clarity or overall visual appearance. Consumers who have no knowledge of treatments would have difficulty recognizing and identifying treated vs untreated amber. If doubtful, always ask questions.
Tuesday, June 14, 2022
Barite-Calcite Composite As Imitation Wulanhua Turquoise From Hubei Province, China
Visual observation may not be enough to distinguish these beads from true Wulanhua turquoise, Raman spectroscopy and EDXRF analysis are necessary to reveal their true identity. Buyer beware.
Thursday, June 09, 2022
Unusual Repair Of A Natural Emerald
This kind of fracture filling repair is unusual for natural emerald. As always, if doubtful, ask questions.
Monday, June 06, 2022
Repaired Grandidierite
Take a look at a fracture-filled Grandidierite to improve the appearance.
Saturday, June 04, 2022
Apatite Oiling: Before And After
Colored stones are treated either to improve color or clarity. Consumers beware.
Thursday, May 26, 2022
Sugar/Heat-Treated Opal
Opals are treated either to conceal the cracks or to improve the appearance. If doubtful, ask questions.
Tuesday, May 24, 2022
Dyed Fluorite
Fluorites are dyed to improve color or clarity. If doubtful, consumers should consult a reputed gem testing laboratory like the GIA before purchasing colored stones.
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