Colorless specimens that show gem quality are a popular substitute for diamond and are also known as "Matura diamond".The name derives from the Persian zargun meaning gold-hued. It occurs as a common accessory mineral in igneous rocks (as primary crystallization products), in metamorphic rocks and as detrital grains in sedimentary rocks.Color in this red or pink series is annealed in geological conditions above temperatures of around 400 °C.), one of the most refractory materials known.Other applications include use in refractories and foundry casting and a growing array of specialty applications as zirconia and zirconium chemicals, including in nuclear fuel rods, catalytic fuel converters and in water and air purification systems.Temperatures of most magmas are in the range 700 °C to 1300 °C.Magma can get forced into adjacent rocks (intrusion or plutonic), or forced out to the surface (extrusion or volcanic) as lava, or blown out in exposions which include rock pieces (tephra).Rock forms when mineral grains (often crystals) grow together.
Zircon has played an important role during the evolution of radiometric dating.
Magma is made up of atoms and molecules of melted minerals.