So, why is gold so expensive? Scientists believe gold arrived ... the lion's share of it's in jewelry. Around about 50% of it is in jewelry. The next level down comes to private investment.

We rounded up the most drool-worthy necklaces, earrings, rings and bracelets from celebrity-owned and Hollywood-loved labels.

Narrator: Even in the high-end world of jewelry, Cuban link chains are a symbol of luxury. This 18-karat gold chain is worth ... And is that what makes them so expensive? Somebody had to literally ...