With its enchanting colours, an opal necklace can symbolise many strong qualities, with a rich history to match.   An opal pendant necklace is thought to represent hope, clarity and truth, surrounding the wearer with an air of tranquillity. In the Middle Ages, it was believed that wearing an opal amulet would help strengthen your memory and mind, and even now is believed by some to promote clarity.   Like sapphires, opals also have ties to royalty. Legend has it that Queen Victoria presented her five daughters with opal jewellery on their respective wedding days.  An opal necklace is regarded as lucky by some and thought to enhance creativity. Because of their unique nature, an opal necklace can be seen as a strong symbol of individuality and self-expression, which may appeal to those with less traditional tastes.