Up for sale is a vintage used Masonic black onyx, diamond ring. 10K gold and marked inside as such. Rectangular black onyx with the Masonic symbol and a small diamond ship. Looking at the back of the ring there is a tiny screw missing from inside, there is one under the Masonic symbol and supposed to be one under the diamond area, this one is missing, although the diamond section does not appear to be loose at all. The band has a buckle design on both sides. It currently has a spacer on it to make it smaller. When removed it would be approximately size 5.5. It weights approximately 6.1 grams on my scale image is part of the description.