This most expensive fountain pen was created in 1999 by Caran d’Ache. He designed this pen to show his respect in memory of Antoni Gaude. Antoni Gaude is a famous modernist architect that lived from 1852 until his death in 1926.
The La Modernista Diamonds fountain pen is made of rhodium coated solid silver components, with an 18-carat gold nib and is covered with 5072 full cut top Wesselton VS diamonds. The diamonds have a total of 20 carats. There are 96 half cut rubies arranged on the top of cap, which forms the monogram.
The pen was sold in Harrods, London through a Swiss company, for $265,000 USD.