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.
Turquoise is among the most valuable of opaque blue gemstones, on account of the stoneâs quality and rarity. The blue stone ranges in shade from sky blue to blue-green. This blue gem is a traditional and modern birthstone for the month of December.In astrology, turquoise is birthstone for Sagittarius.gate is the banded variety of chalcedony, and also occurs with bands of blue. A well-known variety of this blue gemstone is the blue lace agate, which has thin blue stripes against a white body tone. Agate is a traditional birthstone for May and June. In astrology, agate is the birthstone for Gemini.