Amsterdam's Boas Building, home to Gassan Diamonds, is over 130 years old and, as a formerly steam-driven diamond polishing factory, is where Samuel Gassan, founder of Gassan Diamonds, learned how to cut diamonds.

Amsterdam's Boas Building, home to Gassan Diamonds, is over 130 years old and, as a formerly steam-driven diamond polishing factory, is where Samuel Gassan, founder of Gassan Diamonds, learned how to cut diamonds.