HZ > Time zone difference > USA and South Korea. Time difference between USA and South Korea is: +13:0 hours. South Korea is 13:0 hours ahead of USA. That means when it is 1:00 am in Washington DC USA, it is 2:00 pm in Seoul South Korea (same calendar day).
The name apatite is derived from Greek meaning âto deceiveâ likely because it was often mistaken for other, more valuable gemstones, like peridot, tourmaline, and emerald. Apatite is found in igneous, sedimentary, and metamorphic rock, but only the latter grows larger crystals suitable for jewelry.patite is a soft stone, and can be very brittle. Apatite is a mineral that sits at a five on the Mohs Scale. Most commonly seen in green tones, it can also bee found in yellows, pinks, browns, violets, and blues.
Naturally occurring apatites can, however, also have brown, yellow, or green colorations, comparable to the discolorations of dental fluorosis. Up to 50% by volume and 70% by weight of human bone is a modified form of hydroxylapatite (known as bone mineral).ydroxylapatite is the hydroxyl endmember of the complex apatite group. The OH â ion can be replaced by fluoride, chloride or carbonate, producing fluorapatite or chlorapatite. It crystallizes in the hexagonal crystal system. Pure hydroxylapatite powder is white.