Locked away in Philadelphia's natural history museum for decades a set of 10 diamonds finally resurfaced and made their way back to their native state and are now on public display in Piggot, Arkansas. Together they weigh nearly 23 carats and were among 769 carats of diamonds that were mined in Arkansas in 1931. Each of these gems is unique in color, size, and quality. The author uses 19 photos and charts to help these rare, USA diamonds tell their own stories. Read this fascinating account of history, science, and discovery.