This Fred Davis design is impressive with 10 large perfect obsidian stones measuring 1 inch tall and all with a blazing sheen. It is hallmarked as shown and I believe it is A.F. along with D.F. for Mexico City. The weight is a very strong 85 grams heavy. The length is a comfortable 16in. wearable. The silver sheet between the stones form a "cupped" shape which adds dimension and shine to the entire piece. One picture features an Antonio Pineda bracelet that is also listed on my site. Well made and certainly a treasure in superb condition. Just gorgeous, LOOK AT THAT NECKLACE!