Have you been married for a long time? Are you looking for special anniversary gifts to commemorate the memories you have made together? If so, engraved stones may be the gift idea you are looking for. Timeless and durable, engraved stones are an intriguing and romantic gift idea for anyone. As they literally set a message in stone, these stones can be past down through generations, and the memory of your love can last hundreds of years. Modern anniversary gifts of stones have a long history, dating back even before humans could talk. Petroglyphs, or stone carvings, are one of…