Product Details. Genuine Gemstone. Base Metal: Stainless Steel. Coating: 14K Gold PVD Stainless Steel. Add this charm to your One Love Chain Necklace.. Comes with a little card that says:. Opal - The October Birthstone. Enlighten your perspective, build your confidence, live to your full potential. Opal is the stone of opportunity, hope, and transformation. Let it serve as a reminder to keep an open mind so that abundance and opportunity may find you.