Limestone

In order for limestone deposits to be commercially exploitable, they need to be found in large deposits and the majority, if not all, have been found. Limestone does not have a lot of value to rock collectors. In its natural form limestone has a grayish color to it and will powder when it is scratched. Limestone has a vitreous luster to it, a hardness of 3, and a specific gravity of 2.7. Limestone is particularly in style in architecture, and a lot of landmarks around the world, in particular in North America and Europe, are made for the most part of the material. As a matter a fact there were such a great number of buildings in Kingston, Ontario, Canada that were built from limestone that it is nicknamed the 'Limestone City'. Limestone is obtainable and moderately uncomplicated to cut into blocks or more elaborate carving. Limestone is also long lasting and stands up well to exposure. On the other hand, it is a very heavy material, and because of this it is not very convenient when it comes to making taller buildings. Limestone is costly as well.