Total: 82 results found.

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1. Lecture | Trick or Treatment | Bangkok | 13 September 2024
(Lectures)
Lotus Gemology's E. Billie Hughes will review the major treatments of ruby and sapphire and how they can be identified. The treatment of ruby and sapphire is one of the biggest factors that influences ...
Created on July 04, 2024
2. Gem Treatment Disclosure | Notes from the Eastern Front
(Articles)
Discussion of gem treatment disclosure and its somewhat difficult history. A truth that's told with bad intent beats all the lies you can invent. —William Blake [1757–1827], Proverbs, Line 95 In 1987, ...
Created on March 25, 2024
3. Madagascar Sapphire | Low-Temperature Heat Treatment Experiments
(Articles)
... they undergo with low-temperature heat treatment in air, which is an oxidizing atmosphere. Introduction to this Madagascar Sapphire Study This study was sparked by a 2017 comment from noted Australian ...
Created on October 27, 2019
4. Gem Treatment Disclosure | Trust
(Articles)
... too. Value Everyone is taught that gemstones are valuable for three primary reasons – beauty, rarity and durability. Let's consider treatments in light of these factors. The purpose of a treatment ...
Created on January 04, 2014
5. Lecture | A Canary in the Ruby Mine | Brussels | 19 October 2024
(Lectures)
Billie Hughes & Wim Vertriest report the results from their low-temperature heat treatment experiments on Burmese ruby. A Canary in the Ruby Mine: Low-Temperature Heat Treatment Experiments on Burmese ...
Created on July 04, 2024
6. From Fei Cui to Jadeite and Back | Questions and Answers
(Articles)
...  Yes. Just as rubies don’t stop being rubies when they are treated, fei cui doesn’t stop being fei cui when it’s treated. All treatments are clearly stated on our reports. There are many gem aggregates ...
Created on January 03, 2024
7. Detecting Corundum Fillers with the Long-Wave UV Torch
(Articles)
... E. B., 2020). Although emeralds may be the most well-known gemstone that undergoes fracture filling treatment, it is far from the only one. In our laboratory, we have come across fillers in a variety ...
Created on January 03, 2024
8. Lecture | A Canary in the Ruby Mine | Bangkok | 9 September 2023
(Lectures)
Billie Hughes & Wim Vertriest report the results from their low-temperature heat treatment experiments on Burmese ruby. A Canary in the Ruby Mine: Low-Temperature Heat Treatment Experiments on Burmese ...
Created on January 03, 2024
9. Describing Color in Gems | A Fool's Guide ...
(Articles)
... This process has completely upended the gem lab business. Formerly labs were only involved in identifying the type of gem, whether it is natural or man-made, and any treatments that might have been applied. ...
Created on January 03, 2024
10. Yellow Sapphires with Unstable Color
(Articles)
... 3. This small crystal with a melted appearance provides evidence that the specimen has undergone heat treatment. Photomicrograph by E. Billie Hughes; field of view 3.5 mm. Recently an orange sapphire ...
Created on January 03, 2024
11. Canary in the Ruby Mine | Low-Temperature Heating of Burmese Ruby
(Articles)
Detection of heat treatment below 1200°C in ruby and sapphire can present challenges to gemologists. In this study, the authors heated Burmese ruby samples and detailed the features that help in the detection ...
Created on January 02, 2024
12. Lecture | Greasy Business | Oiled Gems Fraud | Tucson | 1 February 2024
(Lectures)
... of this treatment and, most importantly, the remarkable transformation in appearance it may produce. In this program, Richard will demonstrate how the oiling of gemstones other than emerald is now extremely ...
Created on January 02, 2024
13. Lecture | Greasy Business | Oiled Gems Fraud | Taipei | 18 March 2023
(Lectures)
... of this treatment and, most importantly, the remarkable transformation in appearance it may produce. In this program, Richard will demonstrate how the oiling of gemstones other than emerald is now extremely ...
Created on January 02, 2024
14. Lecture | A Canary in the Ruby Mine | Tucson | 29 January 2023
(Lectures)
Billie Hughes & Wim Vertriest report the results from their low-temperature heat treatment experiments on Burmese ruby. A Canary in the Ruby Mine: Low-Temperature Heat Treatment Experiments on Burmese ...
Created on January 02, 2024
15. Lecture | A Canary in the Ruby Mine | Tucson | 31 January 2024
(Lectures)
Billie Hughes & Wim Vertriest report the results from their low-temperature heat treatment experiments on Burmese ruby. A Canary in the Ruby Mine: Low-Temperature Heat Treatment Experiments on Burmese ...
Created on January 02, 2024
16. Lecture | A Canary in the Ruby Mine | Tokyo | 26 October 2023
(Lectures)
Low-temperature heat treatment experiments on Burmese ruby. A Canary in the Ruby Mine: Low-Temperature Heat Treatment Experiments on Burmese Ruby by Lotus Gemology's Billie Hughes One of the challenges ...
Created on January 02, 2024
17. Apatite Oiling | Before and After
(Articles)
Oil treatment has a significant impact on the appearance of an apatite. Apatite Oiling • Before and After Fissure filling of gemstones is an age-old treatment that can improve a stone’s clarity (Gems ...
Created on May 16, 2022
18. Oiled Spinel & Tanzanite | Shocking Revelations
(Articles)
... immerse rough into oil after it is unearthed. This is done not just to make viewing the interior easier, but primarily because it significantly enhances the gem's clarity. In our experience, such treatment ...
Created on September 29, 2020
19. Ruby & Sapphire Books | Collecting the Literature of Corundum | Hidden Treasure
(Articles)
... & treatments France was the epicenter of early research on the synthesis of ruby and thus much of the important work comes from French publications. Fremy’s Synthèse du Rubis (1891) is a rare and valuable ...
Created on August 16, 2020
20. Long-Wave Ultraviolet Torches • A Gemologist’s New Best Friend
(Articles)
... UV light. It can be a tremendous help in detecting treatments and synthetics, as well as a capable tool to screen pieces of jewelry with many smaller stones. One way this can help gemologists is with ...
Created on May 22, 2020