Geographic Minerals

“Manganese” is a chemical element with the symbol ‘Mn’ and atomic number 25. It is not found as a free element in nature; it is…

The Los Lunas Decalogue Stone is a large boulder on the side of Hidden Mountain, near Los Lunas, New Mexico, about 35 miles (56 km)…

The Kensington Runestone is a 202-pound (92 kg) slab of greywacke covered in runes on its face and side. It has been the subject of…

A number of “Runestones” have been found in ‘Oklahoma’. All of them are likely of modern origin, with some of them possibly dating to the…

The mystery stone from Lake Winnipesaukee in New Hampshire is an alleged out-of-place artifact (OOPArt). The stone’s age, purpose, and origin are unknown. In 1872…

Magnesiohastingsite is a calcium-containing amphibole and a member of the hornblende group. It is an uncommon mineral that is found in alkaline basalts, in andesites,…

Magnesioferrite is a magnesium iron oxide mineral, a member of the magnetite series of spinels. It is the mineral magnesium iron oxide, a member of…

Stonehenge is a prehistoric stone circle monument, cemetery, and archaeological site in Wiltshire, England, two miles (3 km) west of Amesbury. It consists of a…

The Nazca Lines /ˈnæzkɑː/ are a collection of giant geoglyphs designs or motifs etched into the ground located in the Peruvian coastal plain about 250…

“Deer stones” (also known as ‘reindeer stones’) are a series of over 1200 ancient standing stones scattered across Mongolia and Siberia, given their name because…

Maghemite, [Fe2O3, γ-Fe2O3] is a member of the family of iron oxides. It is a ferric oxide with a similar cubic spinel crystal structure and…

For many years, the ‘sailing stones’ of Death Valley represented one of the most curious mysteries that scientists had never been able to solve…until recently,…