Conclave 2026

Inclusions and other clarity characteristics in gemstones are typically regarded as undesirable, value-reducing imperfections. However, some rare features can be beautiful and fascinating, such as a dazzling purple garnet crystal in a diamond. Should there be a way to communicate “fancy” clarity features in a gemological report? Help us explore this topic and provide your feedback.

Sculptures of Light: The Artistry of Contrast explores the role of dark zone features in fancy-shaped diamonds and their influence on Visual Performance. Often misunderstood, contrast features are an impactful component of how diamonds create pattern and visual character. Through guided education, comparative analysis, and real-world examples, this presentation examines the wide range of dark-zone appearances across GIA’s grading scales. In addition to providing a sneak peek at GIA’s upcoming fancy-shape cut grade system, the session will explore the fascinating way intentional contrast anchors a diamond’s visual design, providing both dimension and space to its unique optical architecture.

Untreated vs treated gemstones have very different market values, which require the disclosure of treatments to be crucial. From initial discovery to showcasing the treatment's overall effect, this presentation will explore some of the most significant treatments introduced into the market in the 21st century. Gemstone treatments are not going away, which means educating oneself on them is an important tool for anyone in the trade.