Curling Stone

A curling rock is what is thrown through a curler during a game. Curling stones weigh about 42 pounds and also are do of granite. Each team throw eight stones during an end for a full of 16 full stones thrown. After the rock is thrown, two various other curlers will move it as it travels under the ice, do it take trip both straighter and farther.

The underside of a curling rock is concave in, meaning that over there is one air bag under the stone as that travels under the ice. Since curling ice is textured, there space miniature waiting pockets ~ above the surface of the ice. The visibility of this air pockets ~ above the rock and ice is what enables a curling rock to take trip 150 feet under the ice. Additionally, just a small part of the curling rock makes call with the ice cream - this component of the rock is recognized as the running tape or to run surface.

Ailsa Craig

Ailsa Craig is an island turn off the coastline of Scotland and is one of the few places in which the granite used to make curling stones is mined. Some people believe that the island additionally looks favor a curling stone.

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Three varieties of granite space harvested from Ailsa Craig: blue hone, red hone, and green granite. The granite harvested from Ailsa Craig is various from the granite the is used in countertops because it is significantly much more impact resistant. Therefore, a curling rock will never ever crack or rupture when being offered in a game.



The official dimensions of a curling rock are regulation by the human being Curling Federation, the an international governing body of the sports of curling. Based on their regulations, a curling rock must have a one no larger than 36 inches and also cannot be much shorter than 4.5 inches. Additionally, there are weight standardizations in between 38 and 44 pounds. Note that this weight contains the handle and also the bolt the attaches the handle to the stone.

Purchasing Stones

Curling stones room usually offered in sets of eight or 16. They deserve to be marketed either brand-new (directly indigenous the manufacturer) or supplied (from one curling society to another). The only difference is that the brand-new stones have actually not been provided for curling yet.

From a price perspective, the supplied stones are less expensive. For a curling club with limited funds, it may be less complicated to purchase a used collection of curling stones and document them prior to use to conserve money.

Stone Handles


Curling rock handles room made the plastic and come in a selection of colors. The 2 most typical colors space red and also yellow, as watched in most curling clubs and also international competitions.

On the take care of of each stone, there is either an engraving or a sticker through a letter in former of the handle and a number to every side of the handle. This is to differentiate one curling rock from another. Although curling stones look at the exact same to the average person, every one behaves a little bit differently from the others.

Stone Material


As previously mentioned, many curling stones are made the Blue Hone granite, which originates from Ailsa Craig in Scotland. Additionally, the curling stone handle is made of plastic, and also gets attached come the curling stone via a screw the runs v the middle of the curling rock (from top to bottom).

Stone Price


Typically, curling stones are marketed in a set of 16: sufficient for one sheet. Because that this quantity of stones, the supposed sale price is anywhere between $8,000 to $12,000. Typical curling stones will certainly be precious $500 to $750 each.

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

Types the Curling Stones


Since curling has come to be a rather standardized sport, there is only one form of curling stone used because that play at most curling clubs and also international competitions. However, there are some differences between curling stones at a "regular" curling club and also for high-level competition.

At high-level competitions, each stone is mounted with an digital hog heat sensor. This device illuminates green if the stone is released prior to reaching the hog line and red if no (meaning that a Hog line Violation to be committed).

For young children, there room curling stones that sweet 21 pounds together opposed come 42 pounds. These lighter stones allow for youngsters to curly that may not be able to physically press a full-sized stone.

Stone Weight


Generally speaking, curling stones weigh around 42 pounds. Due to manufacturing processes, there is slim variation in the load of a curling stone. Therefore, that is said that curling stones weigh in between 40 and 44 pounds.

In addition to consistent sized curling stones, there are likewise stones that weigh 21 pounds for children to throw. Plenty of young curlers from eras under 12 will throw these smaller sized stones, commonly known as "Little Rocks." This enables young world to enjoy the game of curling just as much as a teens or adult, yet have an less complicated time delivering the stones.

Trefor Granite

Trefor granite is among the species of granite the curling stones space made from. The key manufacturing firm to use trefor granite is the Canada Curling stone company, which supplies both blue/black and red/brown trefor granite. This form of granite is well-known for being affect resistant, which method that the curling stones will not fracture or crack as soon as they collide with one one more on the ice.

The other type of granite supplied is Blue Hone or Red Hone Granite, which originates from the island that Ailsa Craig.

A curling stone is the piece of tools that curlers will throw during a video game of curling. Each rock weighs approximately 42 pounds and are make of granite indigenous Ailsa Craig, one island turn off the coastline of Scotland. A plastic handle is fastened to every curling rock for players to grip when they space delivering the stone. During an finish of curling, every team will certainly throw eight stones, for a total of 16 stones.

Curling stones space thrown under a 150 feet long sheet that ice during a video game of curling. After they are thrown, two other curlers move the rock as the travels down the ice.

At part arena curling clubs, the curling stones are additionally used come smooth out the pebble before curling begins. This is excellent to cut the optimal of the pebble for a flat, however textured playing surface. If the ice cream isn"t fully level, a tongue may further 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 common two room Kays that Scotland and also the Canada Curling rock Company. Each of these manufacturers supplies a different kind of granite, but the resulting curling stone still weighs in in ~ 42 pounds. Additionally, note that curling stones might or may not come through handles attached to them. If the handle aren"t attached, you should purchase castle separately.

First, granite for curling stones is harvested from a granite mine. These large slabs the granite are broken down right into a smaller size such the curling rock "templates" have the right to be cut. ~ the "templates" space cut, stones space individually sanded and also ground down to represent the form of a curling stone. Next, the one of the stones are pitted with glass beads to far better distribute the impact forces as soon as the stones collide with one another. Lastly, a plastic manage is attached to the stone via a screw.

An average collection of 16 curling stones will certainly cost around $8,000 come $12,000. This means that every curling stone costs around $500 come $750. However, the price are significantly lower because that the 21 pound stones for kids to throw. These stones cost around $4,500 per set: around $280 come $300 every stone.

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

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

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

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

In general, the physics the curling hasn"t to be studied well however we do recognize that there is some friction between the curling rock and the ice. This friction acts as a source of heat, i m sorry melts a little layer of the pebble. Since the front of the curling stone "sees" the pebble first, it encounters a higher frictional pressure than the ago of the curling stone. The additional friction at the former of the curling stones allows the back component to move faster. This frictional force differential create a velocity differential, thus permitting the rock to move laterally.

Since 2006, curling stones used in the Olympics have been made by Kays the Scotland, i m sorry come straight from the island of Ailsa Craig. This way that no curler has used the curling stones before the Olympics begins. Having new curling stones because that the Olympics help ensure that the stones play as repetitively as possible since they have not been used yet. Before 2006, the curling stones were developed by the Canada Curling rock Company.

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Curling stones come in one color, gray, since that is the color of the granite that is used to develop all curling stones. The curling rock handles, however, come in a variety of colors. When the most usual colors room red and yellow, other colors such together blue and green can additionally be checked out on a curling rock handle. ~ above the curling stone handles, over there may likewise be one engraving, which is painted a different color from the main color on the handle.