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.
Minerals in the apatite group are all calcium phosphates with the same crystalline structure. The generalized chemical composition of apatite is Ca 5 (PO 4) 3 (OH,F,Cl).This formula represents an admixture of the three important minerals of the apatite group: hydroxylapatite, fluorapatite and chlorapatite.t is a mixture of cryptocrystalline apatite minerals and amorphous calcium phosphates. Apatite is best known for its use as an index mineral with a hardness of 5 in the Mohs Hardness Scale. It is usually green in color, but can be yellow, brown, blue, purple, pink or colorless.