Larger spacer has a curved profile and a sparkling stardust finish on each side. Shown with 8mm & 10mm beads in the picture. Actual diameters run about 11.9mm, 0.5mm thick, hole sizes can vary from about 1.3mm to 1.5mm; note from the picture that some of the holes are not stamped exactly in the center of the spacer. Solid Copper, handmade, sold individually.
Lacy and economical solid copper bead cap works nicely with 6-8mm beads. Rings around holes look a bit silvery in this stock, probably due to silver solder used to attach them to the bead cap.
10mm India Silver Curved Spacer, sometimes also called a curved heishi or a potato chip spacer. Color is bright (not oxidized) and both sides have a stardust finish.