Radiolarite

Romanèchite ((Ba,H2O)2(Mn,Mn)5O10) is the primary constituent of psilomelane, which is a mixture of minerals. Most psilomelane is not pure romanechite, so it is incorrect to consider them synonyms. Romanèchite is a valuable ore of manganese, which is used in steelmaking and sodium battery production. It has a monoclinic crystal structure, a hardness of 6 and a specific gravity of 4.7-5. Romanèchite's structure consists of 2 × 3 tunnels formed by Mn oxide octahedra. It is associated with hematite, barite, pyrolusite, quartz and other manganese oxide minerals. It has been found in France, Germany, England, Brazil, India, and various parts of the United States, including Arizona, Virginia, Tennessee and Michigan, and sites throughout the Appalachian Valley and Ridge.

The unique, naturally polished shiva Lingam tumbled is usually found in shades of brown to tan with a red or maroon ripple effect throughout. Only found in the Narmada River in India, the religiously important shiva Lingam tumbled are used in carvings, as ornamental showpieces, and cabochons.

Clinoclase is a hydrous copper arsenate mineral, Cu3AsO4(OH)3. Clinoclase is a rare secondary copper mineral and forms acicular crystals in the fractured weathered zone above copper sulfide deposits. It occurs in vitreous, translucent dark blue to dark greenish blue colored crystals and botryoidal masses. The crystal system is monoclinic 2/m. It has a hardness of 2.5 - 3 and a relative density of 4.3. Associated minerals include malachite, olivenite, quartz, limonite, adamite, azurite, and brochantite among others. Clinoclase was discovered in 1830 in the county of Cornwall in England. Found at Broken Hill New South Wales, Australia and associated with copper ore deposits in Arizona, California, Montana, New Mexico, Nevada, and Utah in the United States. Also found in France, Germany, Czech Republic, Austria, Romania, Russia, and Zaire. Abichite is another name for clinoclase. The type locality for clinoclase is the Wheal Gorland mine at St Day, Cornwall in the United Kingdom.

Sunset Sodalite tumbled is a beautiful deep blue, very similar to Lapis Lazuli, yet veined with orange or gold colors. Significant sources of sunset Sodalite tumbled are found in Greenland, Brazil, and Canada. It is often used as beads for bracelets and necklaces, or carved into cabochons.