Top Chinese jewellery brands have been accused by watchdogs of not having enough precious metals or quality jewels in their goods, Nanfang Daily reported on Thursday.

South China's Guangdong Province Bureau of Quality and Technical Supervision tested 307 batches of products, and found problems with 102.

Inspectors said metals used in 15 batches were not pure enough – including a Kin Liu Fook silver bracelet, a China Gold silver necklace and a Fook Sang Sang platinum necklace.