GIA Student Body, Santa Monica, CA, 1995, 96, 97, 98. The Art of Gem Carving.

JCK, Orlando Jewelry Trade Show, 1997.

AGTA, Gem and Mineral Show, Tucson, AZ,1994,95,96,97,98.

Institute of Noetic Sciences, Sausalito, CA, 1997, The Geometry and Color of Consciousness—A Metaphysical and Gemological Perspective

Lehrer Designs Gallery, Larkspur, CA, 2000, The Geometry and Color of Consciousness—A Metaphysical and Gemological Perspective