The Hexagonal Collection highlights two area of expertise perfectly mastered by Caran d"Ache. Varius Collection has a masterful shape, a hexagonal body that feels so comfortable in the fingers... The iconic Caran d"Ache collection, Varius is the result of tireless, passionate work on materials. A rare conjunction of striking design and superb writing comfort. Turning the art of handwriting into a daily pleasure. Rhodium is a rare metal in the platinum family and is about twice as expensive as gold. It is extremely hard but its principal advantage is that, because it does not oxidize, it always keeps its magnificent silver sheen. Rhodium is often used with silver to presser its beautiful appearance.