Gorgeous Black Tahitian SHELL Pearl Pendant with 925 Sterling Silver Necklace Details:Chain Material: 925 sterling silverNecklace length:18"Pearl: High simulated Tahitian Black pearl(natural seashell pearl)Pearl size:12mm,Pearl Shape: Round Package: With gift jewelry boxPearls Care tipsPearls are organic gemstones that are vulnerable to acid, alkaline and extremes of humidity. To preserve your pearls' radiance, avoid letting them come into contact with cosmetics, hair spray, or perfume. Always put on your jewelry as a final touch, after applying make-up and styling hair. The pearl's luster can also be harmed by perspiration. To prevent this, before returning your pearls to the jewelry box, wipe them gently with a soft cloth.Be careful not to dip pearl strands in water or wear them while bathing, as water can weaken the silk thread. It's also best to avoid direct sunlight or high temperatures such as in a sauna. If pearls come into contact with substances such as vinegar, fruit juices or detergents, immediately wipe clean with a soft cloth.Ultrasonic cleanser should never be used with pearl jewelry as it can damage the pearls.