Spots of light glinted off the faceted sides of more than a dozen calcite crystals stuck inside a small cave at the top of a steep, rocky couloir. Tom Benedict balanced on a thin log spread across the ...

When looking at calcite under a microscope, a scientist would immediately recognize the crystalline form of calcium carbonate by its rhombohedral appearance. That is, calcite is shaped like a ...

University of Nottingham provides funding as a founding partner of The Conversation UK. However, there are also several reports in Nordic sagas and other sources of a sólarsteinn “sunstone”. The ...

A transparent calcite crystal found 30 years ago on a ship that sank in the English Channel in 1592 could help explain how Vikings were able to sail from Norway to North America 1,000 years ago ...