The padlock heart symbolize unbreakable love, the lock necklace is an ancient symbol that signifies security and protection. This delicate heart necklace is encrusted with a natural conflict-free diamond at its center, this piece is an absolute essential to your necklace collection. BASE METAL - 14K gold. LENGTH - Approx 16" with a 1" extension. CLOSURE - Spring Ring Clasp. PENDANT MEASUREMENTS - Approx 0.65" X 0.1" STONE TYPE - Natural Conflict Free Diamonds. DIAMOND QUALITY - G/H SI. TOTAL CARAT WEIGHT - 0.01 CT. A solid 14K gold piece like this is tarnish-resistant, durable, and will not discolor at all. It is great for everyday wear, even in the shower, beach or gym! With lots of love and great care, it will last a lifetime. Ember Fine Jewelry is known for its resilience and shine. Designed with versatility and comfort in mind, these pieces go with you from casual to active.