 Either way, you will receive the finest diamonds and value. Since Mervis imports our natural diamonds direct from the mining area in Africa, cutting out the middle guy, we offer the greatest selection and value. No one can compete. As for lab-grown diamonds, we show the highest quality Mermaid lab-grown diamonds not available anywhere else but Mervis. The cherry on top is our designer rings, which will show off your diamond like no other. It's rude not to stare.