Pentacle Ring, 925 Silver on Black Onyx, ktSilver Pentacle on Black Onyx Disc Ring 925 Sterling Silver. Striking appearance and a well made piece ~ a round disc of Black Onyx overlaid with a solid silver Pentacle, surrounded by a protective silver besel. It's a dramatic and empowering combination. The Pentacle symbolises balance and harmony of human consciousness with the elements of Nature ( Air, Fire, Water & Earth ) and is popular both as a protection charm and as a symbol for nature based