First of all, if you are wearing jewelry for the wedding, I think it is better to buy something thicker. Because it is used to match Chinese wedding jewelry, it is best to buy thick jewelry. Some people will say that wearing so much thick jewelry is a bit tacky, but I don't think so. What you are wearing now is the jewelry that your husband's family bought for you, and it is the wedding day. Of course, to be decent, to wear gold and silver, to be gem-like, not tacky. This kind of dress is popular in southern Fujian, and I think it will be more dignified and happier after marriage. Brides are also younger and seldom wear these gold jewelry. A thicker necklace is not so suitable for her age when she goes out, but it is more valuable and can be saved as a sum of money.
If aunt buys a necklace, she'd better choose a thinner one. Gold necklaces are more suitable for older aunts. It looks good on you, too. It looks elegant and decent. If it is thicker, it will look tacky when you go out often, which means deliberately showing off your wealth. Moreover, thick necklaces are unsafe and easy to attract the attention of others, especially thieves.
The above is my own opinion. If you have other ideas, please come and discuss with me.