A Rare Diamond Was Almost Thrown Away. Now It's Worth $2.7 Million. – Robb Report
Diamond fetches record $2.5M in online sale -- and buyer says he got a bargain
6 gemstones that are more rare and enigmatic than diamonds
Are Diamonds Really Rare? Diamond Myths and Misconceptions - IGS
Do Lab Grown Diamonds Hold Their Value Or Is The Value Shifting? – John Atencio
Rare Gemstones That Are More Precious Than Diamond
Keyzar · Why Are Diamonds so Valuable?
What Makes the Blue Diamonds Rare and Valuable?
Keyzar · Why Are Diamonds so Valuable?