This happens during the production process. The main reason is that the module is too small for stamping 925 or 990. What is Sterling Silver .
925 Sterling Silver SPLIT RING - 5mm, 7mm - wholesale jewellery making findings
Genuine 925 Sterling Silver Bevelled Split Rings For Charms 5mm, 6mm, 7mm, 8mm
Mystic Topaz Men's 925 Sterling Silver Ring, Men's Silver Ring, Sterling Silver
Women's 925 Sterling Silver Cross Necklace, Heart Cubic Zirconia Pendant Necklaces, M, Sterling Silver, No Gemstone
925 Sterling Silver Round Jewellery Craft Wire 1.0/1.5/2.0mm Recycled Silver
925 Sterling Silver Earring Hooks Kit, 100 Pcs Silver Ear Wires Fish Hook UKOpen
