Both mined and lab-grown diamonds are made of pure carbon that is transformed into sparkling cubic crystalline stones. While their chemical foundation gives lab-grown diamonds the same optical properties as natural diamonds, lab-grown diamonds have no intrinsic rarity. Formed over millennia, natural diamonds acquire their scintillating shapes from the pressure of being compacted deep within the earth’s crust. Because of this, all of the natural diamonds that will ever exist have already been created making them forever rarities. Laboratory-grown diamonds, on the other hand, can be produced limitlessly.