There are two kinds of sodium lights: Low Pressure (LPS) and High Pressure (HPS). These lamps are mostly used for street lighting as well as industrial uses. The lamp works by creating an electric arc through vaporized sodium metal.
Enhanced Turquoise. Enhanced Turquoise is a natural stone that has only been treated with either chemicals and heat, or just heat to enhance the color and harden the stone. This type of treatment keeps the color from fading over time and makes more of the harder turquoise available for the market.
Most of what is called natural is from this category. Stabilized turquoise is less than Gem grade turquoise in that a polymer has been added to the turquoise and replaces the porosity that is in the stone.This highly guarded process uses a drying process to remove the moisture in the stone.tabilized turquoise is turquoise that is pourus and these pours are filled with a polymer that replaces the air that is in the stones.