Minerals were also mined in India, on the territory of ancient Rome, in Greece. Until now, unique black specimens are found there. The most ancient deposits of onyx were located in the Middle East, the Arabian Peninsula and in Egypt (Nile Valley). In fact, it has nothing to do with the described mineral, but is marble with a striped structure.

High resistance to low temperatures (frost resistance)įor decoration of buildings, the so-called Mexican, Algerian or marble onyx is sometimes used.Maximum compressive strength - 50-110 MPa.Hardness on the Mohs scale - 6.5-7 points.The density and composition of the bands depends on the conditions and temperature regime in which the rock was formed.Ĭharacteristics of the main physical and chemical properties of onyx stone: Sometimes in one sample you can find areas with concentric (like agate) and parallel layers. Layers painted in different colors were formed due to the inclusion of impurities - iron, chlorides, magnesium, calcium and other elements.

The mineral appeared as a result of sedimentary processes with subsequent crystallization of the rock. These minerals have a similar chemical structure, but the bands of agate are arranged in concentric circles. Onyx is a translucent or transparent stone with a banded structure. It is used as an ornamental stone for the manufacture of dishes, jewelry, expensive cladding. A distinctive feature of the mineral is the presence of parallel colored bands. It was formed by sedimentation of rocks with a high content of quartz.

Pakistan onyx stone meaning