Fulgor Nocturnus pen: $9 million
Florentine pen maker Tibaldi specializes in proportion, design, and excellent technical execution. So, he crafted the Fulgor Nocturnes based around the Divine Proportion of Phi. This meant ensuring the perfect ratio between its cap and barrel. The pen also features 945 black diamonds and 123 rubies. Only one was ever created, which sold at auction in Shanghai for a record-breaking $9 million in 2010.
So, how much are you willing to pay for a pen? Probably not more than your income, just saying.
