#424 This pendant and necklace set is an infinity-shaped pendant made of sterling silver with a central opal stone. The chain is also sterling silver and measures 18 inches long. The term "pulse opal" refers to a type of jewelry setting, not the opal itself. The pendant in the image features a "pulse setting," which is a design that allows the opal to move or "pulse" with the wearer's heartbeat or movement. This "pulse" action creates a shimmering effect as the stone catches the light. The opal is known for its unique iridescent play-of-color, which is a result of light diffracting through its internal structure. Description: Material: Sterling silver, as indicated by the "925" marking. Design: The pendant features an infinity symbol loop with a central oval-cut opal. Stones: The main stone is an opal, and there are smaller accent stones at the base of the loop, which are cubic zirconia. Ours is a smoke-free home. If you have any questions, please leave a comment below.