Farawa a cikin shekarun 1880 Black Diamond wani yanki ne na ma'adinai na ma'adinai.
Tabbas, mafi mahimmancin jumlar ita ce "Tun daga farkon shekarun 1880 Black Diamond wani yanki ne na hakar kwal na karkara, wanda Kamfanin Black Diamond Coal Mining na California ya bunkasa, wanda ya mallaki kuma ya sarrafa ma'adinai. "