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1. A Canary in the Ruby Mine • Low-Temperature Heat Treatment Experiments on 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 02 January 2024
2. 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 27 October 2019
3. Gem Treatment Disclosure • Trust • Lotus Gemology
(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 04 January 2014
4. From Fei Cui to Jadeite and Back • Questions and Answers
(Articles)
... meaning in Chinese. Can fei cui be used for treated stones? Yes. Just like 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 ...
Created on 03 January 2024
5. 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 03 January 2024
6. Lecture • A Canary in the Ruby Mine • Bangkok • 9 September 2023
(Articles)
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 03 January 2024
7. Describing Color in Gems • A Fool's Guide • Lotus Gemolog
(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 03 January 2024
8. 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 03 January 2024
9. 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 02 January 2024
10. Lecture • Greasy Business • Oiled Gems Fraud • Taipei • 18 March 2023
(Articles)
... 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 02 January 2024
11. Lecture • A Canary in the Ruby Mine • Tucson • 29 January 2023
(Articles)
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 02 January 2024
12. 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 02 January 2024
13. Lecture • A Canary in the Ruby Mine • Tokyo • 26 October 2023
(Articles)
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 02 January 2024
14. 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 16 May 2022
15. FAQs • Frequently Asked Questions
(Articles)
Gem Testing Reports at Lotus Gemology • FAQs Frequently asked questions regarding Lotus Gemology's gem testing, gem origin determination and gemstone treatment identification reports. Submit ...
Created on 21 February 2022
16. 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 29 September 2020
17. Ruby & Sapphire Books • Collecting the Literature of Ruby & Sapphire (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 16 August 2020
18. 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 22 May 2020
19. Gems & Gemology Lectures • Lotus Gemology Bangkok
(Lectures)
... Over the past forty years, Lotus Gemology gemologists have given more than 100 presentations around the world covering topics including ruby and sapphire, spinel, jade, gemstone origin determination, treatment ...
Created on 26 March 2020
20. Gem Testing Reports at Lotus Gemology • FAQs
(FAQs)
Frequently asked questions regarding Lotus Gemology's gem testing, gem origin determination and gemstone treatment identification reports.  
Created on 19 March 2020