The Celtic Triquetra and Celtic Pentagram Sacred Geometry Aromatherapy Double Sided Pendant with Chain is truly a unique item only made by HeartsforLove. The outer ring is a polished rustproof stainless steel that has been gold plated while the interior design is a etched laser cut pattern heavily gold plated bronze plate. Between the two inner plates is a beautiful high quality blue round cotton pad to diffuse your essential oils. The gold plating has been done by real professionals and will not wear off with standard wear and tear utilizing a highly durable modern technique using titanium dioxide vapor deposition that is extremely durable, not like the inferior copper based method that has been used in past times that can also corrode with a green patina!!. The chain is a gold plated stainless steel 24 inch slinky snake chain that is conveniently long enough to fit over the head without using the clasp. The Celtic Triquetra and Celtic Pentagram aromatherapy pendant size is: 1.4 inches in diameter without the clasp and 0.25 inch thick. You get two beautiful intricate designs in one pendant!