EditorialSouth America. Brazil. Sedimentary deposits of diamonds were discovered in 1725. Black slaves in a mine, under the supervision of foremen, performing the washing process for the separation of the diamond from the slag. Illustration, 18th century.
EditorialSedimentary ?. Round slightly trapezoid-shaped pierced stone. The outside is rather coarse in structure. The drilling is done from two sides. The function is unknown. For a spindle, the shape is somewhat unstable and the material is too light. For a ha...
EditorialIndian (Mathura): Railing Pillar with Yakshi, Unidentified artist, Indian (Mathura), 2nd century A.D., Sedimentary stone, Overall: 31 x 7 1/2 x 6 in. (78.7 x 19.1 x 15.2 cm).
EditorialSouth America. Brazil. Sedimentary deposits of diamonds were discovered in 1725. Black slaves in a mine, under the supervision of foremen, performing the washing process for the separation of the diamond from the slag. Illustration, 18th century.