White Gem Jar Jewelry Tray Insert. 50 Gem Jars. 14 1/4" x 7 3/4" x 3/4" This is a new gem jar insert that contains removable clear plastic round jars These jars will hold all of your loose stones, beads and coins Each gem jar comes with a insert pad inside and lid Has 50 gem jars The inside diameter of each gem jar measures approximately 1" (25 mm)