These are vintage faceted glass stones set in a one loop raw brass settings. The back is closed. These stones are two tone. The amount of each color can vary from stone to stone. The stones measure 18mm x 13mm. You will receive 2 pieces. I have these in other colors Need more? Convo me :) This item is made to order. Returns are subject to a 20% Restocking Fee. Vintage Sapphire With Topaz Faceted Stones in 1Loop Brass Setting 18x13mm Ovl003Gg