After seven successful Mediterranean Gem and Jewellery Conferences (2015-2024) and one International Conference in Australia 2023, BrankoGems has organized the first USA International Conference in Helena, June 13-15, 2025 with pre- and post-conference trips to Yogo, Missouri River, and Rock Creek Sapphire Mines and Yellowstone Park.
(trips are limited to a maximum of 30 for sapphire trips)
Many renowned international experts will be discussing Sapphires from Montana, Turquoise Grading. addressing the challenges and difficulties we all face in the identification and determination of natural vs. synthetic and treated diamonds and other gems.
Three practical workshops contain over 200 samples which offer solutions to these challenges by showing techniques utilizing standard and portable advanced gemological instruments.
‘Treatment and origin determination of sapphires’ (Dr. Lore Kiefert)
‘Turquoise Grading’ (Dan Joe Lowry)
and ‘ID of LGD’ (Branko Deljanin).
A Round Table moderated by Travis Lejman (MC), conference co-chair (USA) with seven international experts will discuss ‘Sapphire Origins’ and ‘LGD vs Natural Diamonds’.

The theme of this International conference is EXPLORING AMERICAN GEMS and gem experts will be discussing topics:
▻ “Rock Creek Sapphire Mine”, with Warren Boyd, Potentate Mining (Canada)
▻ “Origin Determination of Sapphires”, with Dr. Lore Kiefert, Gemmological Consultancy (Germany)
▻ “Turquoise 101”, with Joe Dan Lowry, Turquoise Museum (USA)
Other topics on portable instruments for ID Gems & Synthetic Diamonds, AI at conference include:
▻ “Gem Secrets: The Importance of Inclusions & CPF”, with Randall Lightfoot, Mayflower Estate Buyers & Consulting (USA)
▻ “Screening Instruments for Laboratory-grown Diamonds”, with Guy Borenstein, Stuller (USA)
▻ “An Update from GCAL by Sarine Lab: Diamond Traceability, AI-Driven Grading, and Market Dynamics”, with Sharrie Woodring, GCAL (USA)
▻ “How India’s CVD Boom in Production, Treatments and Cutting is Reshaping Diamond Mining and Gemological Testing Worldwide”, with Branko Deljanin, GRI (Canada)
The wonderful success of our previous eight conferences offered a wealth of information, knowledge, and now we add rare glimpses into successful sapphire and mining operations.
BrankoGems conferences have created a unique ‘tech-trade platform‘ with practical workshops for gemmologists, appraisers, and will benefit all professionals in the diamond and gemstone industry.
Branko Deljanin, CGL lab (Canada), Conference Chair [email protected]
Travis Lejman, GAL (USA), Conference Co-Chair [email protected]
10% discount on all conference events and trips to NAJA, NCJV members, previous workshop participants, and on-line students; ask for coupon.For more info and to register, please go to www.gemconference.com/international-conferences
Tap here for more information and for registration!

