This gallery contains 83 photos.
This gallery contains 44 photos.
Sources : futura-sciences, collection-mineraux
This gallery contains 51 photos.
The four gemstones are ruby, diamond, sapphire and emerald. Ruby and sapphire are corundum stones while emerald is a beryl and diamond is a carbon. Source : https://www.futura-sciences.com/sciences/definitions/matiere-diamant-3869/
This gallery contains 3 photos.
Art Deco illustration, ruby and diamond fan double clip brooch by Van Cleef & Arpels (1937) and my pattern.