Records of the Agency for International Development. 1948 - 2003. Photographs of Marshall Plan Activities in Europe and Africa. 1948 - 1989. Africa. French Equatorial Africa. After the concentrate has been put through the final washing at the Central Plant, the diamonds adhere to trays, such as this

ArchivalResource

Records of the Agency for International Development. 1948 - 2003. Photographs of Marshall Plan Activities in Europe and Africa. 1948 - 1989. Africa. French Equatorial Africa. After the concentrate has been put through the final washing at the Central Plant, the diamonds adhere to trays, such as this one pictured, which previously have been covered with a special preparation known as diamond grease, manufactured in England. Photo shows a native worker holding the tray which contains the morning's yield of industrial diamonds. The diamonds are then cleaned by boiling in sulphuric and hydrocloric acid

Records of the Agency for International Development. 1948 - 2003. Photographs of Marshall Plan Activities in Europe and Africa. 1948 - 1989. Africa. French Equatorial Africa. After the concentrate has been put through the final washing at the Central Plant, the diamonds adhere to trays, such as this one pictured, which previously have been covered with a special preparation known as diamond grease, manufactured in England. Photo shows a native worker holding the tray which contains the morning's yield of industrial diamonds. The diamonds are then cleaned by boiling in sulphuric and hydrocloric acid

https://catalog.archives.gov/id/541649

National Archives at College Park