How to charge the ring to change the size

Modify the price of the ring size, which is usually affected by many factors, such as size, ring weight, the material of the ring itself, and so on. The price of modifying platinum rings is higher than the price of modifying the gold ring. This is because platinum needs to be more careful when welding, and at the same time, it also needs special protection to modify the rough of the ring. For example, only diamonds, sapphires, and rubies can withstand the temperature when welding the ring. Other gems need to be removed from the ring, and then the gem and ring need to be welded with laser. These protection measures will increase costs.
Royal Goldsmith
This to change the size of the ring requires a professional jewelry institution or luxury maintenance agency, so as to ensure the effect of the change. In addition to changing the size, the professional Royal Gold Merchant Luxury Maintenance Center can also provide services such as polishing, deformation and plastic surgery, injury repair, and gemstone.

Is it a diamond ring? It is not charged when the diamond ring gets the place where the purchase of the ring is purchased.
The golden ring itself is fine.

30 to 150. What kind of material