Sinkankas Symposium
http://www.sinkankassymposium.net/22 april 2023
25 april - 13 june 2022 (online)
8 april - 7 june 2021 (online)
16 may 202027 april 201914 april 20188 april 2017GIA (Gemological Institute of America)
World Headquarters and The Robert Mouawad Campus
5345 Armada Drive, Carlsbad, California 92008, USA
For the proceedings, see
https://www.strahlen.org/forum/index.php/topic,28244.0.html
2023
Dr. Raquel Alonso-Perez – Tales from the Pala Chief Mine
Bill Larson – The Great Tourmalines of the Pala Gem Mining District
Will Larson – Himalaya Mine Treasures
Brendan Laurs – Geology of San Diego County Pegmatites
Nathan Renfro – Inclusions in Gems and Minerals from San Diego County
Dr. Skip Simmons – Crystallography of Tourmaline
Cal Graeber – San Diego County Mines and Minerals
Meg Berry – Cutting the Gems of San Diego County
Paula Crevoshay – Eureka!
Dr. Aaron Celestian – Using Gems to Illuminate Art and Science
Dr. George R. Rossman and Dr. Aaron Palke – The Causes of Color of the San Diego County Gem Minerals
2022
Evan Caplan
Alexandrite, pricing factors and the future market
William Larson
Collecting color-change minerals and gemstones from world localities
Dr. Ciğdem Lüle
Diaspore from Turkey
Dr. Sally Eaton-Magaña
Color-change phenomena in diamonds
Niveet Nagpal
Designing with color-change gemstones
Nathan Renfro
The microworld of alexandrite and other color-change gems
Stuart Robertson
Price trends of alexandrite and other color-change gemstones
Dr. Aaron Palke and Dr. George R. Rossman
Causes of color in color-change gemstones
Wim Vertriest
Overview of the geology and mining of alexandrite
Robert Weldon
Gem photography's biggest challenge: Color-change gemstones
2021
Tim Adams
Fabergé's Work with Agate and Chalcedony
Patrick Dreher
Dreher Carvings of Agates and Chalcedony
Dr. Peter Heaney
The Complex Mineralogy of Agates
William Larson
Collecting Crypto-crystalline Quartzes: A Conversation with Bill
Dr. Ciğdem Lüle
Chalcedonies of Anatolia: From Neolithic to Modern Day
Nathan Renfro
The Micro-World of Agate and Chalcedony
Dr. George R. Rossman
Cause of Color in Agate and Chalcedony
Robert Weldon
Challenges of Photographing Agates
2020
cancelled
2019
Robert Weldon – Introduction · 8:50 – 9:00 AM
Douglas McLaurin-Moreno – Baja Pearls · 9:00 – 9:30 AM
Blaire Beavers – The History of Pearls · 9:35 – 10:05 AM
Betty Sue King – Evolution of the Pearl Goddess · 10:10 – 10:40 AM
Elisabeth Strack – An Update on Pearl Localities · 11:00 – 11:30 AM
Bill Larson – Collecting Rare and Unusual Pearls · 11:35 AM – 12:05 PM
Chunhui Zhou – A Brief History of Pearl Testing Through Gems & Gemology · 1:15 – 1:45 PM
Stuart Robertson – Pearls: Their Market and Price Trends · 1:50 – 2:20 PM
Hisano Shepherd, Reinventing the Pearl · 2:25 – 2:55 PM
Movie: "Power of Pearl" · 3:30 – 5:00 PM
2018
Dr. Raquel Alonso-Perez, keynote speaker – The Mozambique Belt – abstract »
Meg Berry – Creating a World-Class Tanzanite Collection: From Sourcing to Suite-ing – abstract »
Bruce and Judith Bridges, keynote speakers – 50 Years of Tsavorite and Tanzanite – abstract »
Robert Gessner – Tanzanite: Geology and Gemology – abstract »
Bill and Will Larson – Collecting Tanzanite and Tsavorite Crystals – abstract »
Shane F. McClure – Treatments of Tanzanite and Tsavorite – abstract »
Nathan Renfro – The Microworld of Tanzanite and Tsavorite – abstract »
Stuart Robertson – Tanzanite Price Trends – Past, Present and Future – abstract »
Dr. George Rossman – Additional Remarks on Tanzanite and Tsavorite – abstract »
2017
Edward Boehm – Sapphire Origin Determination: Past and Present
Dr. John Emmett – All the Colors of Corundum
Dr. George Harlow – Syenite-Hosted Sapphires – What's Going On
Alan Hart – Sapphires in the Crown Jewels
Richard Hughes – Sapphire Around the World
Carl Larson – Sapphire: Cut Gems and Crystals from a Collector's Perspective
Glenn Lehrer – The Art and Science of Faceting and Carving Sapphire
Shane McClure – Sapphire Treatments and Their Detection
Nathan Renfro – The Microworld of Sapphires
Dr. George Rossman – Added Attractions on Color in Corundum
Dr. William "Skip" Simmons – Mineralogy and Crystallography of Sapphire
Lisbet Thoresen – Archaeogemology of Sapphire
