Beach stone with black basalt and delicate quartz lines hand picked from the Great Lakes is drilled with a diamond bit. This is a perfect pebble to remind yourself to make positive ripples in your world. Jump ring is sterling silver. Approximate size is 1.25" long by 0.875" wide. Comes with a 16" or 18" round link sterling chain or an 18" round link stainless steel chain. If you have a preference, let me know in the notes!