Antique Lava Cameo Ring with Marcasite

Antique Lava Cameo Ring with Marcasites.  This ring is has is stamped 800.  This hallmark was used in the 19th and early 20th centuries.  The halo style ring is made up of marcasites or white pyrite. Metal:  Silver, purity stamped 800 Finish:  Patina/Polished  Cameo Material:  Lava  Shape:  Oval Gem Material:  Marcasite, FeS2  Shape:  Round Cameo size is 15 x 12 mm Mark:  800  Ring Size:  8 Weight:  5.46 grams or 0.193 ounces Condition:  Good, it has a little place where damage occurred, is more visible underneath.  The location is on the top left of the cameo (when viewing images).  Very heavy patina.  SpecificationsFor:  Women, UnisexAges:  AdultColor:  Dark gray to black, silver