The advantages of having a granite fireplace or fireplace surround are:

Granite fireplaces combine style and durability. They are elegant and sophisticated and have timeless appeal, whilst remaining extremely hard wearing.

Using granite for a hearth underneath a stove combines the protection required by building regulations with aesthetic qualities.

A solid fuel stove will need a flame retardant surface between it and any flammable surface beneath it (wooden floorboards for instance). This is a role in which granite truly excels as it is very heat resistant.