Topic: Is the rise in Childhood Obesity a result of a sedentary lifestyle or due to pre-disposing factors? Research shows that rising number of obese children cannot be attributed solely to sedentary lifestyle or to predisposing factors. The research sites a number of factors that attribute to the childhood obesity epidemic.
Turquoise is an opaque, blue-to-green mineral that is a hydrated phosphate of copper and aluminium, with the chemical formula Cu Al 6 (PO 4) 4 (OH) 8 Â·4 H 2O.t is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its unique hue. In recent times, turquoise, like most other opaque gems, has been devalued by the introduction of treatments, imitations, and synthetics onto the market.
This stone can be found in Armenia, Kazakhstan, China, Australia, Tibet, China, Mexico, Brazil, and Egypt. In Iran, where some of the best stones are found, turquoise is the national gem. The American southwest-Nevada, Arizona, Colorado, New Mexico and California-are primary producers of turquoise. Much of the specimens have a light color, and are porous and chalky-only about 10% is of gem quality.