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Wiki User
∙ 10y agoOpal is a mixture of silica (SiO2) and water (H2O). So the component elements are silicon, hydrogen, and oxygen. Other elements may be present in impurities.
Wiki User
∙ 12y agoit contain silica, iron, magnesium, oxygen, and aluminum minerals.
Wiki User
∙ 9y agoOpals are made up of silica and water. They are not considered true minerals, and can be found in many types of rock.
Wiki User
∙ 10y agoNeither. Opal is a mixture of silica and water.
Wiki User
∙ 7y agoOpal contain silicon, hydrogen and oxygen because it is a hydrated silicate.
Wiki User
∙ 6y agoOpal is a form of hydrated silica.
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