Aventurine properties - description Natural stone aventurine has the appearance of granular mineral formations. It belongs to quartzites and consists of quartz and various inclusions. Most often these are flakes of mica (muscovite), hematite or goethite, other minerals, sometimes iron hydroxide. Aventurine is a hard but brittle stone with a glass luster, which appears only after polishing. Types of adventurers and colours Having the same basis and similar physical properties, different types of aventurine vary significantly in color. Both the colour and the optical effect created by the stone depend on the impurities that make up quartzite. Green aventurines are the most uniform in colour and least fragile, due to the uniformity of the structure. Yellow, brown, pink colours give aventurine different types of mica, cherry and black - hematite. A variety of small-scale inclusions create a flicker effect, reflecting light rays passing through the translucent base of the unit. Most spark