New Gemstone Insert & Display Tray For Jewelry Showcases & CountertopsGemstone Insert. This is a new gemstone insert that contains 36 removable clear plastic round jars. These will hold all of your loose stones, beads and coins. Each gem jar comes with a white insert pad inside and lid. The inside diameter of the gem jars are approximately 1 5/16" (33 mm). The insert measure approximately 14 1/4" x 7 3/4" x 3/4" (36 x 197 x 19 mm) Black Sample Tray. This is a new black sample tray that you can use with a full size jeweler's pad and insert. Keep your jewelry neat and easy to find with this tray. It measures approximately 14 3/4" x 8 1/4" x 1" (37 x 209 x 25 mm).