Natural, Undyed, Lapis Lazuli Stone Collar / Choker Sterling Silver Necklace from  America Eagle Outfitters.

Sterling silver chain is hallmarked 925 on clasp.
Chain has the AE logo on one side and the eagle on the other side of the hang tag.
The connector next to the hangtag is hallmarked 925 ITALY.

Necklace is adjustable at any length up to 18".

Weighs 70 grams.