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 sail for Hong Kong. Next day the cruiser (flying the flag of the Flag Officer Second in Command Far East Fleet) and destroyer took over as escort and proceeded to Hong Kong. "Concord" was sent to Japan after being sworn to secrecy. "Amethyst" subsequently received a message of congratulations from King George VI: Future Governor of Hong Kong Edward Youde was on the British Embassy Staff at Nanking. At great personal risk he penetrated the Chinese Communist lines in an attempt to negotiate the release of "Amethyst" with the PLA. His negotiations came to naught. Youde later was made a