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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 13 March 2023
2. Treatment Disclosure • Notes from the Eastern Front: (Articles); ... from the ever-more sophisticated treatments of “natural” gems. And as someone who was working on the Eastern front of that battlefield in Thailand, I pleaded with the assembled cream of the gemological ...; Created on 01 November 2020
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 27 October 2019
4. 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
5. 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 01 June 2023
6. 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 15 March 2023
7. Lecture • Greasy Business • Oiled Gems Fraud • Taipei • 18 March 2023: (News); ... 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 09 December 2022
8. Lecture • A Canary in the Ruby Mine • Tucson • 29 January 2023: (News); 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 09 December 2022
9. Lecture • Jade: A Workshop • Tucson • 1 February 2023: (News); Hands-on workshop looking at different types of jade. In this hands-on workshop, noted jade expert Richard Hughes will teach attendees about the different types of jade and review the major imitations ...; Created on 11 October 2022
10. 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
11. FAQs • Frequently Asked Questions: (Uncategorised); 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
12. 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
13. 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
14. 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
15. Gems & Gemology Lectures • Lotus Gemology Bangkok: (Articles); ... 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
16. 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
17. Madagascar: Sapphire Isle • Lecture • Tucson, AZ • 6 February 2020: (News); ... (a.k.a. Sierra Leone). The lecture also covers the gemology of Madagascar sapphire and ruby, including the most important identifying features, and results from a series of experiments on the heat treatment ...; Created on 26 January 2020
18. FTIR in Gem Testing • A Pink Sapphire Lesson: (Articles); A discussion of DRIFTS vs the Beam Condenser FTIR attachment in the testing of pink sapphire. The DRIFTS accessory is generally much better at unmasking heat treatment in ruby and sapphire. FTIR in ...; Created on 21 January 2020
19. World Sapphire Market Update • 2020 • Lotus Gemology: (Articles); ... Most of the buying in Madagascar is done by Sri Lankan buyers and as the stones are taken to Sri Lanka for cutting and treatment, many of the blues now sold in Sri Lanka are actually from Madagascar. This ...; Created on 07 December 2019
20. Madagascar Ruby & Sapphire • Ruby & Sapphire: A Gemologist's Guid: (Articles); ... is suitable for heat treatment. Some pieces are colorless with blue cores; many are strongly zoned. The deposit, in which sapphires are found in altered marble and limestone silicates (‘skarn’), is at ...; Created on 18 October 2019

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