This is a Carolyn Pollack ring , it is a dark midnight blue Brazilian Sodalite, made by renowned lisited South Relios Jewelry located in Albuquerque New Mexico. The dark blue gem measure 1 inch by 3/4 inch of Sodalite. There is about 1/4 inch solid silver edge. It is marked ( but very hard to see) with a crescent moon hallmark with R located on the interior of band with an s indicating sterling. I can mail for 5.00 and it will come ready to give in a velvet bag and small gift box. For you from the High Plains of Kansas!!