I already answered it for you.

Baijue is a jewelry brand.

Au750 refers to an alloy consisting of 75% gold and 25% other metals, commonly known as 18K gold. In addition, since 25% of AU750 is made of other metals, it can also be made into different colors, such as white, light yellow and pink (rose gold).

D stands for diamond and ct is the carat weight unit.

The title means Baijue 18k inlaid with 0.120ct diamond ornaments.

I hope the answer can help you.