Amethyst element impurities), and the presence of trace elements, which result in complex crystal lattice substitutions. The hardness of the mineral is the same as quartz, thus it is suitable for use in jewelry. Amethyst occurs in primary hues from a light pinkish violet to a deep purple. Amethyst may exhibit one or both secondary hues, red and blue. The best varieties of amethyst can be found in Siberia, Sri Lanka, Brazil and the far East. The ideal grade is called "Deep Siberian" and has a primary purple hue of around 75–80%, with 15–20% blue and (depending on the light source)
SS Empire Amethyst The crew of "Empire Amethyst" are commemorated on the Tower Hill Memorial. Official Numbers were a forerunner to IMO Numbers. "Empire Amethyst" had the UK official number 164848 and used the Code Letters BCPL. SS Empire Amethyst Empire Amethyst was an 8,032 ton tanker which was built in 1941. She was torpedoed and sunk by on 13 April 1942. "Empire Amethyst" was built by the Furness Shipbuilding Co Ltd, Haverton Hill-on-Tees as yard number 330. She was launched on 8 July 1941 and completed in December 1941. "Empire Amethyst" was built for the Ministry of War Transport and operated under