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 brown dove dark and white sub-ocular eye-lines, reddish-brown chin and throat with darker streaking, shading on breast to medium to darkish dull brown with narrowly edged dark back and scapulars. They also have pink flesh around the eye with amethyst or purple iridescence on the nape. Amethyst brown dove The amethyst brown dove ("Phapitreron amethystinus") is a species of bird in the family Columbidae. It is endemic to the Philippines. It occurs on most large islands except Palawan but is generally rather scarce on Luzon and Mindanao and even rarer elsewhere. Its natural habitats are subtropical or tropical moist lowland forests and