You are admiring an incredible specimen from my personal collection, a Calliostoma annulatum (Lightfoot, 1786) measuring 18.5mm and graded F++/Gem...an awesome, super ornamented form along with an amazing color pattern...a beautiful specimen. This beauty was dredged at 20 fathoms from Puget Sound, Washinton State, USA. A member of the collector favorite Calliostomatidae family & a fantastic addition for your Calliostoma collection...I think it is a breathtaking specimen, a very difficult to get species from a rarely seen locale, too. Thank you for visiting our store this evening...and an excellent choice.