![]() ![]() Different varieties can be found in almost every country in the world. Well known for its variety of colours and markings jasper is widely used for decorative purposes.Ī relatively hard stone, jasper grades 6.5 to 7 on Mohs scale of hardness. ![]() Jasper can also develop through the crystallisation of hot solutions in cracks of igneous rocks. Patterns are often the result of the motion of natural forces that brought the sediment (or volcanic ash) together. The different sediments determine the colour of the stone. The silica then acts like glue and cements everything together. This happens when groundwater containing silica that has seeped into sedimentary rock dries up. The formation of jasper can begin when loose sediments become stuck together. Stones can also exhibit many other colours. Whilst blue is rare, shades of red yellow and brown are common. They're rarely uniform and often overlap or merge into each other. Stones mostly exhibit more than one colour. Jasper is known for its vibrant colour and patterns. Impurities of chlorite can turn jasper green. Impurities of clay cause a yellowish, white or grey colour and goethite introduces yellows and browns. The presence of iron oxides usually in the form of hematite turn jasper red. They're also responsible for its different colours and markings. Impurities are the reason why jasper is opaque. This is because although made up primarily of quartz and/or chalcedony it often features impurities of many other minerals and substances. Microcrystalline means its crystals are too small to be seen with the naked eye.Īlthough often referred to as a mineral some consider jasper to be a rock. Jasper is a microcrystalline variety of the mineral chalcedony. Jasper Stone Properties, Meaning, Facts and Photos Contents ![]()
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