This creation by Hunnisucklebeads is called "Black Onyx Bangle".

It is made up with a silver plated bangle which has a semi precious Black Onyx stone cabochon set on it.
The bangle is approximately 7 inches ( 18cm ) in diameter and the cabochon measures approximately 18x13mm.
There is also a sterling silver pendant necklace using the same
black onyx cabachon.
These make lovely gifts for bridesmaids.