These brand new lever back earrings are crafted in solid sterling with genuine Ethiopian flashy opals. Photo 5 shows caliper. Photod are zoomed so view this. This has been acid tested and professionally tested Photo 8 shows stamp. Please view my other 10k, 14k, , Kay jewelers , zales , vintage , , white gold. Rose gold, yellow gold , gemstones , wedding rings Art Deco fine jewelry, engagement/wedding ring . Solid gold diamonds , opals,Ruby’s,emerald,gemstones,and other jewelry i have posted Two day shipping