Jasper Jasper Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases, is an opaque, impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron(III) inclusions. The mineral aggregate breaks with a smooth surface and is used for ornamentation or as a gemstone. It can be highly polished and is used for items such as vases, seals, and snuff boxes. The specific gravity of jasper is typically 2.5 to 2.9. A green variety with red spots, known as heliotrope (bloodstone), is one of the traditional birthstones
Mineral del Monte Mineral del Monte Mineral del Monte, commonly called Real del Monte ( or El Real, is a small mining town, and one of the 84 municipalities of Hidalgo, in the State of Hidalgo in east-central Mexico. It is located at an altitude of . As of 2005, the municipality had a total population of 11,944. The Mine District of Pachuca—Real del Monte has a long and rich heritage. The mines in the district are conservatively estimated to have produced 1.2 billion Troy ounces of silver and 6.2 million ounces of gold. That is 6% of the silver mined throughout the