A 37-carat diamond, half pink and half colorless, found in Botswana, intrigues scientists due to its two-stage origin and ...

The rise of lab-grown diamonds has increased the size you can get for the money, but the newly engaged take offense at inquiries: “It’s rude to ask.” ...

Kate Middleton's engagement ring features a blue sapphire stone surrounded by 14 round-cut solitaire diamonds. It's set in 18 ...