Welcome To Black Diamond Geckos. We are a small private breeder based out of Pittsburg,California in Contra Costa County. The name Black Diamond refers to the Black Diamond Mines Regional Preserves in Antioch,California. We take great pride in our family of animals. We specialize in breeding Crested Geckos. All of our cresties are Healthy, Happy critters. So please take some time to Like us on Facebook and check out our Available page.