I spent about two hours with Ring Concierge, trying on diamond rings. If you or your lady want a white, sparkly, durable treasure that's. That's why Chocolate DiamondsÂ® â€” and Le Vian's original designs â€” appeal to women who want to know about diamonds. This process takes about 3 months for many lab-grown diamonds. Diamond cutting is one of the best-known and most sought-after gemstones.