Thumbnail, 0.5 x 0.4 x 0.4 cm
Diamantina, Jequitinhonha valley, Minas Gerais, Southeast Region, Brazil
A sharp, very lustrous diamond crystal from the classic locality here, a river whose diamond-bearing sands lent its name to the place. This is unusually sharp and equant for the locality as most are flattish. Also, it has a pleasant brown color whereas most are gray to white. Lastly, note the fine adamantine luster, a characteristic of this locality. Weight is 0.66 carats.