8" Specular Hematite Slab from Michigan DS2390

8" Specular Hematite Slab from Michigan
Approx. Dimensions: 8x5x0.25 inches
Approx. Weight: 730 grams
Locality: Upper Peninsula, Michigan
This specular hematite (specularite) slab has a high gloss varnish applied to the front. It includes an acrylic slab stand.

Hematite from Michigan's Upper Peninsula holds significance both historically and geologically. The region is renowned for its rich hematite deposits, particularly in areas like the Marquette Iron Range. These deposits have played a crucial role in the industrial development of the United States, with mining operations dating back to the mid-19th century. Hematite, a mineral composed of iron oxide, is a major source of iron ore, and Michigan's hematite deposits have been instrumental in supplying raw materials for steel production. Chemically, hematite has a chemical formula of Fe2O3 and typically appears as shiny metallic gray to black crystals or as dull red to brown masses. It exhibits a hardness of 5.5 to 6.5 on the Mohs scale and a high specific gravity. Hematite from Michigan's Upper Peninsula continues to be mined today, contributing to the region's economy and the global iron industry.

Specularite is a variety of hematite characterized by its shiny, reflective surfaces, often resembling polished metal. It typically forms as tabular or platy crystals and occurs in metallic-gray to black colors. Specularite derives its name from the Latin word "speculum," meaning mirror, due to its reflective nature. The mineral is primarily composed of iron oxide and often occurs in association with other iron-bearing minerals in metamorphic and hydrothermal environments. Specularite has been used historically as a decorative stone and pigment, and it holds significance in both industrial and lapidary applications. Its distinct luster and metallic appearance make it a valued specimen among mineral collectors and enthusiasts.