This ring is a rare vintage Artcarved Siladium Purdue University class ring. The ring has a timeless design and is made of pure Siladium. It has an antique finish with an oval black natural onyx gemstone. The gemstone is set in a solitaire style and is engraved with the Purdue University theme. The ring is handmade and is a perfect graduation gift or collectible for a Purdue University fan.