the black finish is not permanent.  Yellow brass? bronze? instead of sterling.
I absolutely love the color of the chrome diopside.  However, as with other black pieces I purchased, the black finish has rubbed off very quickly, exposing yellow metal that is probably either bronze or brass.  Not sure where the sterling is. Possibly, as with many Chinese pieces (925), these are simply plated or contain no silver at all.  What a shame.
Rating: 1 stars