Instant modern elegance. A rounded bar in your choice of plating (gold is 18k gold plated, silver and Gunmetal colors are rhodium plated) holds spherical stone with band. Arc measures 4.5" in diameter with 2" extender at opening, pendant measures 0.75" in diameter. This necklace rests at the top of the collarbone and worn by holding open the collar slightly to slip the opening around the neck. Excessive bending/strain on the collar is unnecessary for wear and therefore not covered in the item's warranty.