Oligoclase
What is onyx, its gemological characteristics
Onyx, its properties and uses Onyx is a type of white and black opal (cryptocrystalline quartz or chalcedony) This stone should not be confused with marble onyx, which is a limestone Onyx texture is parallel and homogeneous Some types of onyx, such as Sard onyx with a brown base and white top surface, carnelian onyx…
Onakite stone, specifications and application of onakite stone
What is Onakite Unakite is an igneous rock that is mainly composed of pink orthoclase feldspar, greenish-yellow epidote, gray or grayish quartz and small amounts of magnetite, chromite, ilmenite, apatite, zircon and other minerals Another name for this granite is epidote. Onakite stone is found from the fall of glaciers into the water and its…
Recognition of Oclaz stone – Laboratory of Gemology
Identification of oklase stone and its use Euclase (in English: Euclase) with the chemical formula AlBe[OH-SiO4] is a group of minerals and has full violet luminescence. It is derived from the word classus. Euclase is a rare beryllium aluminum hydroxide silicate mineral that crystallizes in the monoclinic system. It has the chemical composition of BeAlSiO4(OH)….
