The curling stone is made of Scotland granite stone without mica. It is made of granite without mica
Curling is also called curling, in Fourteenth Century originated in Scotland, in Scotland has also saved 1511 years (i.e. rubstone with curling). In 1795, the first Curling Club was founded in Scotland in 1838, Scotland enacted the first official Curling Club competition rules. In 1807 1820 the Canadian curling activity was introduced, in the United States and other popular. Since then, curling as a winter sports developed in Europe and North America gradually. China joined the World Curling Federation in 2002.
The selection of this stone, and is related to the properties of mica granite, the hardness is about 6, and the hardness of mica is less than 3, even worse, there are mica exfoliation, like layers. Like scales, this material is a touch dregs, is not suitable for the manufacture of curling up.The last reason, curling or high nobility movement, the use of a real estate of pure natural materials, there is Bigger. A few decades ago Chinese have cast stone craft, want what what what proportion of material hardness can be easily made out of stone.
The curling stone is made of Scotland granite without mica. It is 30 cm in diameter, 11.5 cm in height and 19.1 kilograms in weight.Mica is a useful mineral, often associated with granite. But Europe alone lacks mica. Since curling comes from Scotland, Scotland's materials are best suited to the rules of curling. Just imagine, if the proportion of different materials, the hardness is not the same, the result of the match all sorts of strange things.
The curling is made of granite without mica, which comes from the origin of the curling stone.
