Helpful Rock Links

Member Business Links

Non-Rock Related

El Cajon Valley

Gem and Mineral Society

Member/Business Links

Rock related

The El Cajon Valley Gem & Mineral Society is a group of dedicated, diverse and fun people. In addition to our shared passion for all things geological, our members have a plethora of skills, talents and professions. Here is a list of member-owned businesses with links to their websites. There is strength in our community.

Brian Lorenz​

​​Mineral ID Key (another Bob's Rock Shop tool)

"Is This Rock Any Good?" -  PDF/XML File on Considerations for a Cabochon