Most likely it was a loose chunk of granite that popped off, got under the pad and caused the scratch. It happens.
In short, yes. Granite is a natural stone, and although it is hard and can be scratch resistant, it still can be scratched. In order to protect granite (and other natural stone) a special coating is applied. Some natural stones are more scratch resistent, some are much less. In order to protect granite from scratching, this veneer or protection must be applied regularly (usually at least once a year).
The best curling stones are made of granite from Scotland or Whales
They are used for granite counter tops for in your home and such.
A person who polishes stones is typically referred to as a lapidary or a stone polisher. If you want check lapidary's work you can visit Cabochonsforsale to know all the things.
Granite
The kinds of stones that you can carve are Soapstone, Alabaster, Limestone, Marble, Granite.
They are mede of granite that usually comes from Scotland or Whales
granite and limestone
a big pile of stones scratch that... a broadside i think....
Granite or precious stones
Granite was used by the Egyptians for status, the Incas for fortresses, and the United States for roads and paving stones.
Curling stones are made by a company called Kays of Scotland, which is located in southwest Scotland. The granite that the company uses to make the stones is mined from Ailsa Craig, a small island off the west coast of Scotland. Curling stones are also made in Canada by Canadian Curling Stone Co., which uses granite from Trefor quarry in Wales, U.K.