Gemstone industry in Greenland gemstone ruby. The native inhabitants continued to assist the European explorers with their ruby exploration, leading them to some half dozen locations, spread out for over a hundred miles along the southwest shores of Greenland, known as the Kitaa Coast. Ruby and pink sapphire are the red and pink varieties of the mineral corundum, an aluminum-oxide mineral Al2O3. The pink/red colour is formed in corundum by adding the element chromium to its crystal structure. Spectroscopy of rubies from the Aappaluttoq occurrence in Greenland confirm the presence of chromium as well as showing absorption in the UV region indicating high Fe
Gemstone Publishing then to Gemstone, which has been the home of Cochran's EC reprints for over 15 years. Reprinting the Cochran/Gladstone-reprints of "The Haunt of Fear", "The Vault of Horror" and "Weird Science" (all 1992), Gemstone also republished (in single issue and 'annual' - four issues per 'annual' - format): Oversize, hardback, slip-cased collections of these comics had been previously published in black & white by Cochran during the 1980s as "The Complete EC Library". This Library was then added to by Cochran/Gemstone with 2005's "Picto-Fiction" collection, comprising the EC comics: "Confessions Illustrated", "Crime Illustrated", "Shock Illustrated" and "Terror Illustrated", along with