This is a great all Sterling Silver and natural rock stone men's necklace. Jet is a natural very lightweight rock or stone. This piece has been hand cut and polished. The great Sterling Silver cap has a Sterling Motorcycle on it and was hand made and designed for this piece. This is a large piece approx 2" x 4" x 1". It is on a black pliable leather cord with our great signature magnetic clasp. We will make it the length you would prefer,