Justin K. Prim is an internationally renowned gem cutter, author, and educator whose work spans the history, science, and artistry of gemstone faceting. A returning voice from Gemlogue 2025, Justin chose to return for 2026 — bringing with him a perspective that is rare in its combination of technical depth and historical breadth.
At Gemlogue '26, Justin appears both on the Conference stage and as co-leader of the intimate hands-on Workshop on 28 September alongside Guinness World Record holder Victor Tuzlukov. Together, they offer something no single session could — a comprehensive view of gem cutting as both craft and art form.
Internationally recognised gem cutter with deep mastery of faceting techniques spanning Eastern and Western traditions.
Author on the history and science of gemstone cutting — making technical knowledge accessible to practitioners and enthusiasts alike.
Known for breaking down complex cutting methodologies into clear, applicable understanding — across workshops and published work.
Spoke at Gemlogue 2025 and chose to return for 2026 — a mark of his commitment to Sri Lanka's gem industry evolution.
What You Will
Walk Away With
- ◆Gain historical and cultural context for why gem cutting traditions developed as they did — and why it still matters today
- ◆Understand the science behind how different cuts release different light patterns within a stone
- ◆Learn from a practitioner who bridges Eastern and Western cutting philosophy in one perspective
- ◆Attend the hands-on Workshop on 28 September — led by Justin alongside Guinness World Record holder Victor Tuzlukov
“Understanding the history of cutting is understanding the future of what gems can become.”
Justin K. Prim
Common Questions
Hear Justin K. Prim
at Gemlogue 2026
Tickets are now available. Secure your place at the Conference and Workshop.
Questions? info@ceylongemlogue.com
SPEAKER · GEMLOGUE 2026
Justin K. Prim