GRANDIDIERITE 1.14 ct: Gemologist Olga Melikyan determines the quality of grandidierite скачать в хорошем качестве

GRANDIDIERITE 1.14 ct: Gemologist Olga Melikyan determines the quality of grandidierite

Hello, dear viewers! In this video, I will conduct a detailed study of a rare and expensive gemstone - grandidierite. You will learn about its unique properties, the history of its discovery, its cost and how to distinguish a natural stone from fakes. My contacts: WhatsApp: https://wa.me/79533630943 Telegram: @olgamelikianofficial 00:00 Greetings and introduction to the topic of the video. 00:02 Introduction to the topic: what is grandidierite, its rarity and value. 00:24 History of the discovery of grandidierite: By whom and when it was discovered. Named after the French mineralogist Grandidier. First finds and their quality. 03:05 Characteristics of grandidierite: Hardness (7-7.5 on the Mohs scale). Purity and jewelry potential. Rarity and cost (from 15 to 30 thousand dollars per carat). 06:02 Practical part: Measuring the weight of the stone (1.114 carats). Determining the size with a caliper. 08:21 Study of optical properties: Trichroism (color change depending on the viewing angle). Checking the purity under a magnifying glass (the stone is perfectly clean, without inclusions). 12:26 Working with gemological instruments: Refractometer: measuring refractive indices. Polariscope: checking anisotropy. Dichroscope: confirming trichroism. 15:01 Authenticity tests: Reaction to ultraviolet light (no glow). Comparison with synthetic spinel. 17:25 Stone evaluation: Clarity and color (highest level - Loop Clean). Cut and its impact on cost. Final evaluation 20:30 Conclusion: GEMMOLOGICAL INTENSIVE is already on the doorstep! On Saturday, April 12 from 11:00 to 17:00, the long-awaited GEMINTENSIVE will take place - my author's training in gemology. 🔥 WHEN? April 12, 2025 from 11:00 to 17:00 💎 WHERE? Saint Petersburg, Petrogradskaya Storona ✅ Only 8 places (3 places already available) You can book via Telegram: @olgamelikianofficial In 1 day in a group of 8 people, I will PERSONALLY pump up your skills in using gem devices so that you can confidently diagnose the most popular stones. WE WILL DIAGNOSE AND EVALUATE TOP QUALITY COLORED GEMSTONES YOU WILL RECEIVE a personal gem guide and a system for assessing the cost of stones. You will be able to determine a reasonable price range and easily discard stones that do not have prospects for price growth. YOU WILL LEARN the pitfalls and features of different certificates, how to read them to your advantage. Upon completion of the intensive course, each participant WILL RECEIVE A CERTIFICATE of successful completion of the GEMINTENSIVE Coffee break, goodies, great communication and the best stones in the world in one place To book participation, write to me in Telegram: @olgamelikianofficial Possibility of individual training. Please leave a comment and subscribe to the channel. If you are interested in precious stones and their study, be sure to watch the video to the end! Don't forget to like and subscribe to the channel. Until next time! 💎✨ #Grandiderite #Gemology #PreciousStones #OlgaMelikian #gemstones