Since 1912. Diamond of California. Diamond Nuts are Made for Homemade. When we were started by a group of California, Diamond of California was on a mission to bring the bounty from California’s walnut farms to America’s tables. From the beginning, we sought out the very best with the knowledge that Diamond Nuts would be used in treasured any new family recipes. Our Orchards in bags of Diamond Pecans, some pecans might be from our very own orchards. We’re growing pecans on several thousand acres in Georgia and Arizona, and fin the climates to be ideal for harvesting some of the best pecans out there. Diamon is proud to bring pecans from its very own harvest to the family table. Our orchards. Your table.