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
Amethyst Incident drawing the attention of PLA snipers. By the time the shelling stopped at about 11:00, 22 men had been killed and 31 wounded in all. "Amethyst" had received over 50 hits and holes below the waterline were plugged with hammocks and bedding. During this time the destroyer "Consort" was sighted, flying seven White Ensigns and three Union flags, steaming down from Nanking at 29 knots. Admiral Madden, the Flag Officer, second in command, Far East Station, ordered the destroyer HMS "Consort" (Commander Robertson) to go from Nanking to the "Amethyst"'s assistance, and ordered the frigate "Black Swan" (Captain Jay) to