Limited batch. Uniquely beautiful. Full of real flavor. Made with non-GMO ingredients. Reclosable. Since 1912. Hello Heirloom Reserve. Since 1912, when we were started by a group of California walnut farmers, Diamond of California was on a mission to bring the bounty from Californias Central Valley walnut farms to Americas tables. Today, we have created Heirloom Reserve, a curated selection of seasonal heirloom nut varieties that we want to share with you. What is an Heirloom? In the world of fresh produce, heirloom varieties are those that have often been passed down over generations, naturally beautiful, and full of real flavor. With the passage of time, these delicious but often less conventionally beautiful heirlooms might become harder to find. Guarantee of quality. For recipes, visit us: diamondnuts.com. Facebook. Instagram.