Conclave 2026

How do we know a diamond is a crystalline form of pure carbon? How can we say they formed up to 3.5 billion years ago, at great depths within the Earth? We hear a lot of facts, accept a lot of information… but what – indeed, who – led us to these revelations?

In this presentation, Elizabeth will bring to life the key discoveries that shaped our understanding of diamonds through the stories of the brilliant minds behind the research, reminding us that every advance in science is, ultimately, a very human story.

Appraisal Standards Subcommittee Chair Joel Hassler, ACGA, will go over some of the highlights and details of the new Appraisal and Report Standards passed by the Board of Directors earlier this year.

Production of laboratory-grown diamonds (LGD) for jewelry is constantly evolving, introducing new advancements that occasionally alter the properties of these stones. These changes raise the risk of misidentification by trade members using shelf product screening devices (also known as Diamond Verification Instruments), which could lead to reputational damage and loss of trust. This presentation provides a detailed review of the latest screening models and technologies for distinguishing natural diamonds from LGDs. Each method and its features are explored, along with limitations and blind spots identified by Stuller’s research on 20 million screening tests. Additionally, new advancements in HPHT and CVD melee LGDs, and the challenges to current screening methods, will be discussed.

Credentials can verify knowledge in a specialized field, and professional growth, experience, and competency are an ongoing journey. With the emergence of AI, appraisal professionals are also navigating new tools and opportunities that are reshaping the profession. As we take a trip down appraisal lane, we will review how appraisal content requirements have evolved and discuss how to create professional, competent, and complete appraisal reports that effectively serve your clients.

Not all jewels are as popular as diamond, ruby, sapphire, and emerald; some are a bit underappreciated. But that doesn’t make them any less spectacular. While these gemstones have been gaining recognition in recent years, there's even more to them than meets the eye. Learn about the lore, history, and science that make peridot, garnet, tourmaline, zircon, and spinel unique.

It's one thing to earn your Graduate Gemologist® (GG) diploma from GIA, but having your GG does not automatically qualify you as an appraiser of gems and jewelry. For decades, the jewelry industry has been complacent by allowing professionals who only hold their GG to sign off on valuation documents, calling themselves appraisers. While earning the GG diploma is critical and no easy feat, Mike and Randy will discuss other imperatives that are necessary if one wishes to be successful in appraising gems and jewelry. This session will be geared toward anyone who wants to elevate their careers by understanding the duality of gemology and appraising, why USPAP® matters, and their professional development beyond their GG.