Base Metal: 925 Sterling Silver
Plating: 18K Yellow Gold or Rhodium
Stone: Multi-colored Cubic Zirconia.
Stone Size: 3mm width; 0.10 carats.
Details: Outside diameter 2cm, depth 2mm.
Oxidation appears with time as this is just the metal (silver or brass) reacting to the oxygen in the air. Thus, this is considered normal wear and tear and is not a defect.