Luxury industry leaders Montblanc and Van Cleef & Arpels unveil the $730,000 limited edition Mystery Masterpiece. The companies collaborated on the handmade work of art – the most expensive writing instrument ever created – that takes an artisan a year and a half to create. It is being released in three variations, set with over 20 carats of rubies, sapphires or emeralds, and nearly 840 diamonds. Each variation is limited to three pieces worldwide for a total of nine pieces. (PRNewsFoto/Montblanc)