Stretching or shrinking the metal can only be done with plain rings that are the same thickness and width all the way around with no stones.
Rings with stones or graduated widths necessitate adding or removing material in order to size.
Sizing assistants are a great solution if your size fluctuates frequently, or to keep a ring from spinning on your finger.Head Replacement
The head is the part of the ring that holds the gemstone or diamond in place. It is made up of a metal base and prongs. A head can have between 4 to 6 prongs; these prongs hold the main stone in place. When and why should you do it?
Head replacement is necessary when the prongs are worn, the head is cracked, or grooves are made in the ring that weakens the head structure.