Curling Stone

A curling rock is what is thrown by a curler throughout a game. Curling stones weigh around 42 pounds and also are made of granite. Each team throw eight stones throughout an end for a full of 16 full stones thrown. ~ the rock is thrown, two other curlers will sweep it together it travels under the ice, do it take trip both straighter and farther.

The underside of a curling stone is concave in, meaning that there is one air pocket under the stone as that travels under the ice. Due to the fact that curling ice cream is textured, there room miniature air pockets top top the surface ar of the ice. The presence of this air pockets top top the rock and ice cream is what permits a curling rock to travel 150 feet under the ice. Additionally, just a small component of the curling rock makes contact with the ice cream - this part of the stone is recognized as the running tape or to run surface.

Ailsa Craig

Ailsa Craig is an island off the shore of Scotland and also is one of the couple of places in i m sorry the granite provided to do curling stones is mined. Some people believe that the island additionally looks prefer a curling stone.

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Three types of granite are harvested indigenous Ailsa Craig: blue hone, red hone, and also green granite. The granite harvest from Ailsa Craig is various from the granite the is provided in countertops because it is significantly an ext impact resistant. Therefore, a curling stone will never crack or rupture as soon as being supplied in a game.



The official dimensions that a curling rock are regulated by the human being Curling Federation, the global governing human body of the sport of curling. Based upon their regulations, a curling rock must have actually a circumference no bigger than 36 inches and also cannot be shorter than 4.5 inches. Additionally, there are weight standardizations between 38 and also 44 pounds. Keep in mind that this weight consists of the handle and the bolt the attaches the manage to the stone.

Purchasing Stones

Curling stones room usually marketed in to adjust of eight or 16. They can be sold either brand-new (directly indigenous the manufacturer) or offered (from one curling club to another). The only difference is that the new stones have not been offered for curling yet.

From a price perspective, the provided stones are much less expensive. For a curling society with restricted funds, it might be less complicated to acquisition a used collection of curling stones and record them before use to save money.

Stone Handles


Curling rock handles room made that plastic and come in a selection of colors. The 2 most common colors are red and yellow, as checked out in many curling clubs and also international competitions.

On the take care of of every stone, over there is either an engraving or a sticker with a letter in prior of the handle and a number to each side of the handle. This is to distinguish one curling stone from another. Although curling stones look the same to the typical person, every one behaves a tiny bit differently from the others.

Stone Material


As previously mentioned, most curling stones room made that Blue Hone granite, which originates from Ailsa Craig in Scotland. Additionally, the curling rock handle is made of plastic, and gets attached come the curling rock via a screw that runs through the middle of the curling rock (from peak to bottom).

Stone Price


Typically, curling stones are offered in a set of 16: enough for one sheet. Because that this quantity of stones, the expected sale price is anywhere between $8,000 to $12,000. Mean curling stones will certainly be worth $500 come $750 each.

Some curling stone manufacturers do not offer their stones with handles. Therefore, you may be required to purchase rock handles separately, which normally run about $30 come $40 per stone handle.

Types the Curling Stones


Since curling has end up being a rather standardized sport, over there is just one type of curling rock used for play at many curling clubs and also international competitions. However, there are some differences between curling stones in ~ a "regular" curling club and for high-level competition.

At high-level competitions, each rock is installed with an digital hog heat sensor. This device illuminates eco-friendly if the rock is released before reaching the hog line and also red if not (meaning the a Hog heat Violation was committed).

For young children, there space curling stones that weigh 21 pounds as opposed to 42 pounds. These lighter stones permit for children to curl that may not be able to physically push a full-sized stone.

Stone Weight


Generally speaking, curling stones weigh roughly 42 pounds. Due to manufacturing processes, over there is slight variation in the load of a curling stone. Therefore, the is claimed that curling stones weigh in between 40 and also 44 pounds.

In addition to continuous sized curling stones, over there are also stones that weigh 21 pounds for children to throw. Plenty of young curlers from ages under 12 will certainly throw these smaller stones, typically known as "Little Rocks." This allows young world to reap the video game of curling just as much as a teenager or adult, but have an less complicated time transferring the stones.

Trefor Granite

Trefor granite is among the species of granite that curling stones space made from. The key manufacturing company to use trefor granite is the Canada Curling stone company, which offers both blue/black and also red/brown trefor granite. This type of granite is known for being affect resistant, which means that the curling stones will certainly not fracture or crack once they collide v one another on the ice.

The other form of granite offered is Blue Hone or Red Hone Granite, which comes from the island of Ailsa Craig.

A curling stone is the piece of equipment that curlers will certainly throw during a game of curling. Each stone weighs around 42 pounds and are made of granite indigenous Ailsa Craig, an island turn off the coastline of Scotland. A plastic take care of is fastened to each curling stone for football player to grip as soon as they are delivering the stone. During an end of curling, each team will certainly throw eight stones, because that a complete of 16 stones.

Curling stones are thrown under a 150 feet lengthy sheet that ice throughout a game of curling. After ~ they room thrown, two other curlers sweep the rock as it travels down the ice.

At part arena curling clubs, the curling stones are likewise used come smooth out the pebble prior to curling begins. This is done to cut the top of the pebble because that a flat, but textured playing surface. If the ice isn"t fully level, a tongue may more dish the ice, yet curling stones will not execute that.

Curling stones have the right to be purchased indigenous a few manufacturers in the world. The most typical two are Kays of Scotland and also the Canada Curling rock Company. Every of these manufacturers provides a different kind of granite, yet the result curling stone still weighs in at 42 pounds. Additionally, keep in mind that curling stones might or might not come with handles attached to them. If the handle aren"t attached, you need to purchase them separately.

First, granite for curling stones is harvested from a granite mine. These big slabs the granite are damaged down into a smaller size such that curling stone "templates" deserve to be cut. After the "templates" space cut, stones space individually sanded and ground down to represent the form of a curling stone. Next, the circumference of the stones space pitted v glass beads to much better distribute the affect forces when the stones collide through one another. Lastly, a plastic manage is attached come the stone via a screw.

An average set of 16 curling stones will cost approximately $8,000 come $12,000. This method that every curling stone costs about $500 come $750. However, the prices are considerably lower for the 21 pound stones for youngsters to throw. This stones cost about $4,500 per set: around $280 come $300 per stone.

Note that part curling stones are offered without handles, therefore you may need to purchase them separately.

Curling stones, if taken care of properly, deserve to last for more than ten years. Among the most usual problems v curling stones is the they have trouble "gripping the ice" as they age. To remedy this, curling clubs will "paper the stones." This way that curling clubs usage sandpaper to texture the running surface of the curling stone so the the stones can have a much better grip top top the ice and travel under the ice together one would expect them to.

According come the human being Curling Federation, a curling rock must have a one no larger than 36 inches and also must be taller 보다 4.5 inches. This tip is given because the production of curling stones isn"t precise science; each stone will rotate out a small differently 보다 every other stone. This imprecision in manufacturing also explains why every curling rock behaves differently from every one of the others.

There space a couple of companies that offer curling stones. Few of the optimal companies room the Canada Curling rock Company and Kays that Scotland, both of i m sorry have developed curling stones for the Winter Olympics. One more common curling stone manufacturer is Thompson Rink Equipment. Keep in mind that when you purchase curling stones, they may come in to adjust of eight or 16, depending upon the manufacturer.

In general, the physics of curling hasn"t to be studied well however we do know that there is some friction between the curling stone and the ice. This friction acts together a source of heat, which melts a little layer of the pebble. Since the former of the curling rock "sees" the pebble first, the encounters a greater frictional force than the earlier of the curling stone. The additional friction in ~ the prior of the curling stones allows the back part to relocate faster. This frictional pressure differential create a velocity differential, thus allowing the rock to relocate laterally.

Since 2006, curling stones offered in the Olympics have actually been manufactured by Kays the Scotland, which come right from the island of Ailsa Craig. This way that no curler has actually used the curling stones before the Olympics begins. Having new curling stones for the Olympics help ensure that the stones beat as repetitively as possible since they have actually not been offered yet. Prior to 2006, the curling stones were created by the Canada Curling stone Company.

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Curling stones come in one color, gray, since that is the shade of the granite that is supplied to create all curling stones. The curling stone handles, however, come in a selection of colors. While the most usual colors are red and also yellow, various other colors such together blue and also green can additionally be checked out on a curling rock handle. Top top the curling rock handles, over there may also be one engraving, which is painted a different shade from the main color on the handle.