This is an authentic JOHN HARDY Sterling Silver Black Sapphire Lava Rock Dog Tag Necklace. This stunning necklace is crafted of a sterling silver chain that holds a dog tag necklace that is accented with black sapphires and features a lava rock center. Enjoy this necklace with the special touch of style only from John Hardy! Follow this item for alerts. John Hardy is a registered trademark of John Hardy. FASHIONPHILE is not affiliated with John Hardy.