STONE DISCLAIMER Please note that the stone used in this product is synthetically made. Black howlite is created in a lab to mimic natural (white) howlite and is not created naturally. STERLING SILVER Our sterling silver wire is made entirely of S925 silver. The wire is shower safe, allergy-friendly, does not create a metallic smell when touching your skin, will not tarnish and does not turn your skin green. Sterling silver does oxidize naturally over time. You can read the Product Care section