Iridescent Goethite (Turgite) from Mexico DS1453 chalcoyprite Swiss Quartz Point

Swiss Quartz Point

4" Guerrero Amethyst

and exhibits the optical phenomenon of double refraction where an object viewed through the calcite will appear doubled

chrysoprase can be suitable for various jewelry applications

Iridescent Goethite (Turgite) from Mexico DS1453 chalcoyprite Swiss Quartz PointIridescent Goethite (Turgite) from Mexico Approx. Dimensions: 3x2x2 inches Approx. Weight: 100 grams Locality: Durango, Mexico Turgite from Durango, Mexico is an attractive iron oxide mineral specimen most often found at the historic Ojuela Mine in Mapim, Durango, Mexico. It isnt a distinct mineral species in its own right but is generally described as an iridescent mixture of hematite (Fe? O?) and goethite (FeOOH) formed by alteration of iron