Diamonds with GIA certificate have the function of preserving value. Although your drill is a little small, it is recommended to check whether it meets the instructions of the certificate when making the finished product. Surface texture should not affect the quality of diamonds.
It is estimated that it should be 6000-7000 yuan. Of course, it seems that you bought it online. If you are in the store, this diamond should be more than 10000!
You can choose 18k gold for the ring holder, because the texture of 18k gold is hard, and it is less likely to fall out. It is recommended to use 6-claw setting for the same reason: in order to prevent drilling! Of course, it doesn't matter if you don't wear it every day, as long as you like the style. If you want to drill capital, you usually go mosaic.