"Jewellery QC" typically stands for "Jewellery Quality Control." This refers to the process of inspecting jewellery items to ensure that they meet certain quality standards before they are sold or distributed to customers. QC involves various checks such as examining for defects in craftsmanship, verifying the authenticity of materials used, assessing the accuracy of gemstone settings, and ensuring that the final product matches the specifications provided by the manufacturer or designer. Quality control is crucial in the jewellery industry to maintain customer satisfaction and uphold the reputation of brands or retailers.