Men's 0.925 Sterling Silver Simulated Opal 1.5" Irish Celtic Knot Cross Pendant Necklace, 18" to 24" MADE WITH 0.925 STERLING SILVER: Our premium quality pure 0.925 sterling silver provides a top quality shine and durability. SIZE AND MEASUREMENTS: Cross pendant is 39mm in length and 20mm in width. Size comparison  US Dime: 17mm, US Nickel: 21mm, US Quarter: 25mm. Take a look at the sizing image for more details. CHOICE OF CHAIN: Our pendants comes with your choice of a sterling silver 1.5mm, 2.3mm, 3.3mm rope chain, a 1.5mm, 2.2mm box chain, a 2.0mm curb chain, a 1.5mm bead chain, a 2.3mm Figaro chain or a 3.3mm cable chain in either 18in, 20in or 24in sizes. (Custom lengths are available upon request). All chains are made of solid 0.925 sterling silver with a coat of anti-tarnish rhodium plating applied to ensure the highest quality and the longest lasting endurance possible. CUSTOMER SATISFACTION: 100% customer satisfaction is our # 1 priority and we fully stand behind every product we sell. If you simply do not like the item for any reason, we provide a hassle free 30 day return policy and 100% money back satisfaction guarantee. If you return it for an exchange instead of a refund, we offer a 10% discount along with free US shipping. Type: Celtic Cross Size: 39mm x 20mm Finish: Antique Metal: Sterling Silver Purity: 0.925 Birthstone: Simulated Opal Back Side: Solid Jan: Garnet Feb: Amethyst Mar: Aquamarine Apr: (Simulated) Diamond, CZ May: (Simulated) Emerald Jun: (Simulated) Alexandrite, Pearl Jul: (Simulated) Ruby Aug: Peridot Sep: (Simulated) Sapphire Oct: (Simulated) Opal, Tourmaline Nov: Citrine Dec: (Simulated) Tanzanite, Turquoise, Zircon <span class="a-text-bold">Genuine: </span>Are mined from the earth and are created by nature. <span class="a-text-bold">Synthetic:</span> Are grown in the lab and will share all the characteristics of the nature gemstone. They are identical in chemical composition and optics to the real gem. <span class="a-text-bold">Simulated:</span> Are imitations of a real gemstone in looks only, but shares no chemical or optical characteristics. It can be any material that looks like a real gem.