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常言道“物以稀为贵”。红柱石是一种少见的矿物晶体,而产于河南的粗大的宝石红柱石晶体,更是国内外罕见的珍品。红柱石,若晶体横断面上形成“黑十字”型者,又称为空晶石,是一种富铝贫钙的矿物,化学式为Ai_2O_3·SiO_2。在河南省西峡县桑坪乡—军马河乡下古生界二郎坪群地层中找到一个宝石红柱石矿带,现已探明的储量和远景储量表明为一大型红柱石矿床,引起了宝石界和地质工作者的极大兴趣。本区红柱石的重要特征是矿层分布稳定,晶体粗大完整,多呈自形晶,少数半自形晶,呈近四方柱
As the saying goes “things are rare”. Andalusite is a rare mineral crystal, and produced in Henan’s coarse ruby andalusite crystals, but also rare rare treasures at home and abroad. Andalusite, if the crystal cross-section to form “black cross ” type, also known as the spar, is a mineral rich in calcium and calcium, chemical formula Ai_2O_3 · SiO_2. In the Xixia County, Henan Province, Sangping Township - Junma River Paleozoic Erlangping Group strata found in a gem Andalusite belt, the proven reserves and long-term reserves showed a large Andalusite deposit, causing the gem community And the great interest of geologists. The main characteristics of the area andalusite distribution of stable ore, crystal integrity, mostly self-shaped crystal, a small number of semi-self-crystal, was nearly square column