BRITISH MODERNISM Cocktail Ring In 18Kt Chrysocolla

British geometric ring with a Chrysocolla. An amazing sculptural cocktail ring, created in England during the modernism period, back in the 1970. The ring has been carefully crafted with geometric round patterns in solid yellow gold of 18 karats with high polished finish. The design of the ring was made in three dimensions like a spiky basket, which is holding on top a blue Chrysocolla. Chrysocolla The name of this gemstone comes from the ancient Greek χρυσός (chrysos) and κολλα (kolla), "gold" and "glue," in allusion to the name of the material used to solder gold and was first used by Theophrastus in 315 BC. Chrysocolla has a cyan (blue-green) color and is a minor ore of copper. It is of secondary origin and forms in the oxidation zones of copper orebodies. A 2006 study has produced evidence that Chrysocolla may be a microscopic mixture of the copper hydroxide mineral Spertinite amorphous silica and water. Chrysocolla: Mount in the center in multiple prongs settings, with 1 round cabochon cut (10 x 10 x 6 mm) of a natural Chrysocolla of about 3.5 carats. Birthstone: Chrysocolla for the month of December. Weight: 9.2 Grams, (5.90 Dwt). Size: 6.5 and can be sized on a special request. Measurements: 20 mm by 20 mm (0.79 x 0.79 Inches) and raise 12 mm over the finger. Hallmarks: Stamped with the maker's mark, the mark for the assay of the 18kt gold and signed, "DJS .750". Collateral: This ring is accompanied by a presentation jewelry box. Cond