Company Name | : | ASTU MADENCİLİK DIŞ TİCARET LİMİTED ŞİRKETİ |
Location | : | İSTANBUL / SANCAKTEPE |
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MINERALS QUARTZ Quartz is a chemical compound consisting of one part silicon and two parts oxygen. It is silicon dioxide (SiO2). It is the most abundant mineral found at Earth's surface and its unique properties make it one of the most useful natural substances. Quartz is one of the most useful natural materials. Its usefulness can be linked to its physical and chemical properties. It has a hardness of seven on the Mohs Scale which makes it very durable. It is chemically inert in contact with most substances. It has electrical properties and heat resistance that make it valuable in electronic products. Its luster, color and diaphaneity make it useful as a gemstone and also in the making of glass.
MINERALS CHROMIUM ORES Chromium is a metalic element. Because it is very hard and has a melt ing point of 1857 °C, it is used to increase the hardness of metals and in the manufacturing of armoured vehi cles. It is quarried in Erzurum, Adana, Elazığ, Mugla, Bursa and Eskişehir.