Necklaces I’d buy at Sotheby’s auction in September

I've just found out that Sotheby's is going to organize the “Important Jewels” auction this September in New York. I spent my whole weekend looking through the amazing fine jewelry that is on sale and I simply fell in love with some items. 

What would I buy if I had the money? Oh God, a lot! Here are the necklaces I love the most and I promise I’ll show you soon the bracelets, rings and earrings I've chosen. The necklaces couldn't be worn alone, right? 

18 KARAT GOLD, PLATINUM, SAPPHIRE AND DIAMOND NECKLACE, MARCHAK

18 KARAT TWO-COLOR GOLD, EMERALD AND RUBY NECKLACE AND EARCLIPS,CAZZANIGA

18 KARAT GOLD, CORAL BEAD, ENAMEL AND DIAMOND NECKLACE, SCHLUMBERGER,PARIS

18 KARAT GOLD, EMERALD, SAPPHIRE AND DIAMOND NECKLACE AND BRACELET

GOLD, SILVER, SAPPHIRE BEAD AND RUBY NECKLACE, RENÉ BOIVIN, FRANCE

18 KARAT GOLD, COLORED STONE AND DIAMOND NECKLACE,BULGARI, AND A PAIR OF 14 KARAT GOLD, AMETHYST AND DIAMOND EARRINGS

Estimated value: 100.500 - 142.000 USD. If you wonder how much these pieces would cost...