First, let’s rip up the rulebook that says you can’t be sustainable and splurge. Case in point: You can now shop a rare collection of beautifully preserved, vintage Christian Dior jewelry on Farfetch.

Christian Dior learned to heed the prophecies of fate early on. When he was 14 years old with little inkling of what the future might hold, a palm reader predicted he would one day go from rags to ...