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Photo of a crystal.

List of stones

Rocks, minerals and crystals, including precious and semi-precious gemstones.

Photo of a marble statue
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Marble is limestone that has been changed from a sedimentary rock to a crystalline one through high pressures under the surface of the Earth. Marble is much stronger than limestone, and can be polished to a shiny finish. It is frequently used for making statues from, and for making decorative features in buildings like floors and pillars from.
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Mis forMineral

Minerals are something naturally occurring, often called rock, stone or if they are to be used for mining, ores. People often break nature into three groups, animal, mineral and vegetable.
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Moonstone is a mineral made from potassium aluminium silicate. It is formed in thin layers, which gives it an interesting light scattering effect called adularescence. The highest quality moonstones come from Sri Lanka.
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Ois forObsidian

Obsidian is a dark glass formed in the larval flows of volcanos. Obsidian doesn't have a crystalline structure and can be broken into very thin pieces that can be used to make a very sharp cutting edge, spear tip or arrow head.

Ois forOlivine

Olivine is a common olive green mineral made up of magnesium iron silicate. It has also been found in asteroids and on the moon. Olivine can be quite brittle. When olivine is transparent and gem quality, is is called peridot.

Ois forOnyx

Onyx is a type of quartz. It comes in a variety of colours, with the most common being striped and black. The black variety is most popular in jewelry making.

Ois forOpal

Opal is not a true mineral, but a crystalline gel made up of spheres of silicon dioxide and water. The pattern of the spheres makes opal refract light into lots of different colours, with blue and green being the most common. Opal is used often in jewelry, and is the national stone of Australia.

Ois forOre

An ore is a kind of rock that can be processed to turn it into something valuable, like metal or an element like sulfur. Low grade ore doesn't contain much of what you want, whereas high grade ore contains a lot. Ore is usually dug up in large quantities in a mine.
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Pis forPearl

Pearls are made inside the shells of mollusks like clams and oysters. They are usually round, and have a soft, translucent glow to them. Pearls have been made into jewellery for thousands of years.

Pis forPeridot

Peridot is gem-quality olivine. Olivine is quite common but peridot is rare, so peridot is considered a precious gem.