Friedrich Mohs harder. This became the basis of the hardness scale developed by Mohs. The hardest mineral, diamond was given a value of 10 and softer minerals such as talc were given the very low value of 1 (unity). Other minerals were given intermediate values, depending on their ability to scratch another mineral in the scale. Thus gypsum was given the value 2 because it will scratch talc crystals, and calcite the value 3 because it will scratch gypsum. Minerals are also now classified by chemical characteristics, but the physical properties are still useful in field examination. In 1812, Mohs became a
Geo-Mineral Exploration Corporation Geo-Mineral Exploration Corporation Geo-Mineral Exploration Corporation is an environmentally-sensitive exploration, acquisition, and merger company, which examines the viability of consolidating historic underground mining properties into small-scale specialty production alliances. The Geo-Mineral Corporation and its independent affiliates, are fully American-owned and operated. The Geo-Mineral Exploration Corporation was formed in 1968, as a limited partnership of twelve mining-industry professionals. In 1969, with claims to three properties in hand, the Geo-Mineral partnership converted all shares to simple, and preferred stock certificates, as the board unanimously voted to change its structure into that of a Corporation. Geo-Mineral Exploration Corporation (also known as Geo, Geomineral,