Rockcrystal is colorless and most common variant of the mineral quartz (silicon dioxide, SiO2) The name "crystal" derives from the Greek word "Krustallos" which means ice. It was believed that rockcrystal was designed by the gods ice. At the time of the Mesolithic rockcrystal was known. During Roman times from the Alps under the name "petrified ice" on the market. Theofratus called it "krystallos". Also Pliny the Elder mentions it. The name "Quartz" was introduced in 1529 by Georgius Agricola. The peoples of the East considered rock crystal and stone of patience and perfection. Tibetans use crystal to crystal to behandelen.De wounds choice as a drinking glass or as part of medieval jewelry can be attributed to the belief that these crystals would crack or discolor when they came in contact with poison So the chain was a amuletdat protecting the king compare Rudolfinische imperial crown and the chain of the Jehovah-order Genesis:... Megnatites, pegmatites, hydrothermal and alpine stone veins, alluvial deposits Appearance:. Rock crystal is naturally widespread, but not always in gemstone quality Historically known sites are India and Sri Lanka (near Tatnaputi) Iridescent quartz from the area of Poona in India and out.. Myanmar is a rarity. Beautiful crystals come from Kenya and Madagascar, also from Brazil (Minas Gerais), Goisas, Bahia and French Guiana. In the US, Rhinestone for in pegmatites, including in Maine (in Ausburn, New York, North Carolina, Arkansas (Crystal Peak) and California. Of particular significance are occurrences in the Alps. Rhinestones are found in Switzerland (eg Urim where a crystal of 135 kg has been found in the area of the St. Gotthard and Grimsel), in Austria (in 1965 at the Grossglockner found a crystal of nearly 1,000 kg in a cavity). Rhinestones are also found in Germany, the Czech Republic Poland and France in the collections of several museums are unique faceted rhinestones The Smithsonian Institution Washington has a polished stone of 7000 kt and a rock crystal sphere with a diameter of 33 cm and a weight of 48.5 kg.. it comes out Burma and was cut in China.
The search of rock crystal in Bancroft & Mount Ida Arkansas USA
Gemstone therapy Rockcrystal
Hematite (from Greek: αιμία, Haima, blood) is a mineral which is mainly composed of ferric oxide crystals (iron (III) oxide, Fe2O3), one of the iron oxides. It comes in addition to other varieties like the red blood stone and gray-black to black gloss iron and iron oxide. The mineral has a hardness between 5 and 6. The so-called stripe, stripe or color, the color issuing the mineral to rub on an unglazed porcelain dish, usually a characteristic blood-red - the mineral it takes its name. It may contain trace amounts of magnesium, manganese and titanium mineral. Hematite comes both before and going as mineral in sedimentary layers. It is often the cause of reddening of many rocks. Along with hematite often other iron ores such as magnetite, limonite and iron ore. If magnetite is converted to hematite is called martite. The mineral occurs worldwide, in Europe, in Germany, among others in the area of the Lahn which is the world's largest concentration of iron ores in the Eifel Mountains, the Harz Mountains and the Thuringian Forest. Furthermore, in England in Cumberland and North Lancashire, in Belgium in Vezin and Namur, on the Italian island of Elba and in Spain. In Africa, Algeria is a significant producer and in the United States of America it is found at the Upper Lake and at the Missouri. More than half of world production now comes from China, Brazil and Australia. In addition, the mineral is also in high concentration on the surface of the planet Mars. This creates the typical orange-red color of the "Red Planet". The mining of hematite is one of the earliest mining of humanity: the powdered mineral was found in about 80,000 years old graves. Both on the Greek island of Thassos and in the places Rydno in Lovas in Poland and Hungary, have grooves known from the Palaeolithic. Also in Germany, traces of prehistoric mining of similar size found in Bad Sulzburg and in Münster from the time around 5000 BC that the Linear Pottery Culture at the Topline are due. The Etruscans had already abundant prevent iron shine known on the island of Elba.
Gemstone Therapy Hematite