Amethyst and it can not be differentiated with absolute certainty without advanced gemmological testing (which is often cost-prohibitive). There is one test based on "Brazil law twinning" (a form of quartz twinning where right and left hand quartz structures are combined in a single crystal) which can be used to identify synthetic amethyst rather easily. It is possible to synthesize twinned amethyst, but this type is not available in large quantities in the market. Single-crystal quartz is very desirable in the industry, particularly for keeping the regular vibrations necessary for quartz movements in watches and clocks, which is where a lot
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