Tuesday, September 10, 2013

Gemstone of the Week: Hemimorphite

(Hemimorphite image found on gemselect.com)

Hemimorphite is a beautiful gemstone and was given the name "Hemimorphite' in 1853 having previously had other names including 'Calamine' (a name no longer in use in mineralogy).  It's name is an allusion to the hemimphoric form of the crystals. Hemimorphite has a hardness of 4.5-5 with an adamantine, vitreous, pearly, or silky luster.  Crystals may be transparent or translucent and its colour range includes: colourless, white, blue, yellow, green to apple green, purple, pink, bluish-grey, and brown (from impurities). Some iridescent examples have also been found.  Hemimorphite is found in: Algeria, Angola, Argentina, Australia, Austria, Belgium, Bolivia, Bulgaria, Brazil, Canada (provinces of: British Colombia, Newfoundland, Labrador, Northwest Territories, Nova Scotia, Quebec, and the Yukon Territory), Chile, china, Czech Republic, Democratic Republic of Congo (Zaire), Egypt, Finland, France, Germany, Greece, Greenland, Guatemala, Hungary, India, Iran, Ireland, Italy, Japan, Kazakhstan, Mexico, Morocco, Namibia, New Caledonia, North Korea, Norway, Peru, Poland, Portugal, Republic of Congo (Brazzaville), Romania, Russia, Slovakia, Slovenia, South Africa, Spain, Sweden, Switzerland, Tajikistan, Tunisia, Thailand, England, Scotland, Wales, Vietnam, Yemen, Zambia, Zimbabwe, and the states of : Wyoming, Wisconsin, Washington, Virginia, Utah, Texas, Tennessee, Rhode Island, South Dakota, Pennsylvania, Oklahoma, Ohio, North Carolina, New York, New Mexico, New Jersey, New Hampshire, Nevada, Montana, Missouri, Massachusetts, Maryland, Maine, Kentucky, Kansas, Iowa, Illinois, Idaho, Connecticut, Colorado, California, Arkansas, Arizona, and Alaska.