Month: March 2013

Surface mining is a method used to extract minerals and metals which are near the surface of the...

Anthracite Anthracite is found in many places around the world and is a compact and brittle carbon...

Jade is a name that was applied to ornamental stones that were being brought to Europe from China...

Jet is fossilized wood formed from a species of Araucaria (the monkey puzzle tree). It is...

Formerly called fluorspar, fluorite has a wide range of colours including yellow, blue, pink...

A dark green to black variety of Jadeite. Jadeite is one of the minerals recognized as the...

Carnelian also spelled Cornelian, a red variety of chalcedony, much used as an ornamental stone,...