Turgite over Quartz - Spain #5 Location_India It is extremely unusual in

It is extremely unusual in that it will appear green-blue in natural daylight

with a crust of Quartz grown over the top

Pikes Peak in Colorado and Greenland

Although the technical term would be ironstone concretion

Dickite is a clay mineral that has the same formula as Kaolin and Hallyosite

Turgite over Quartz - Spain #5 Location_India It is extremely unusual inThis iridescent Turgite coating over Quartz specimen is from the San Valentin Mine in Spain. You will receive the exact Turgite specimen shown in the pictures. Turgite is a trade name used nowadays to refer to Iridescent varieties of iron oxide minerals, most commonly Goethite or Hematite, that often coat other minerals such as Quartz. As it isn't a single, defined thing, it isn't classified as a mineral, and it's usage had changed over the years,