Thumbnail, 2.2 x 1.9 x 1.5 cm
'Mbumba, Pimbi hill, Sanda, Mindouli, Pool Region, Republic of Congo (Brazzaville)

Pimbi Hill, Mindouli, Republic of Congo has put out a small number of outstanding dioptase specimens. This fine thumbnail features gemmy and lustrous, dark emerald-green dioptase crystals in a very aesthetic pattern. Material of quality dates from the 1950s to mid-1970s. Ex. Dick Jones Collection.