Cornerstone Collective is California’s first research-based medical cannabis collective, established in 2007 under California’s Compassionate Use Act.
Cornerstone Research is a fully licensed collective focusing on customer education and quality products. Drawing on 11+ years of practice we offer personalized service aimed at educating our customers and providing carefully curated products. We employ strict testing standards to ensure the purity and quality of our medical grade products. We carry a wide variety of cannabis genetics that are unmatched, highly effective, and include several medical Cannabis Cup winners.