Amazon.com : Denifery Bridal Hair Pin Emerald Gold Hair 。This is VERY SPECIAL Hair Jewelry . Stylish hairpin featuring a striking hydro Emerald with copper and gold accents. Perfect for adding a touch of elegance to any hairstyle. This is one of those special pieces that could be passed down from mother to daughter as an heirloom. Hydro Emeralds are higher quality and more coveted than lab created Emeralds because they mimic the natural natures process of how natural Emeralds are formed. Hydro emeralds, also known as hydrothermal emeralds, are synthetic emeralds created in a laboratory using a hydrothermal process. This process mimics the natural geological conditions that form emeralds deep within the earth, using heat and pressurize a solution containing the necessary elements for emerald formation (beryllium, aluminum, silicon, and oxygen).