The base for Alexia Ashford's choker necklace. This is not a complete product, to complete it you will need the Alexia Ashford Jewel (
https://www.shapeways.com/product/5CPSZQEJK/alexia-ashford-jewel), or a similarly sized stone.
This was modeled after Alexia Ashford's choker from Resident Evil Code: Veronica (
seen here).