The name Amber for the stone obtained its name from French, Middle English known ambre, from ambra of Medieval Latin and from Arabic names anbar ambergris. Amber can vary in color from yellow to red, from green to blue, but amber's color is usually honey brown. The best commercial amber is transparent, but some varieties are cloudy. Amber is treasured and used for centuries in jewelry. It was familiar to Paleolithic peoples and to the Greeks and Romans, who used it extensively in jewelry. Amber has been used for decoration since the stone age. Amber is perhaps the oldest substance used for human adornment. The healing ability of Amber is excellent for eyes, and for glandular swellings of the throat and lungs. Amber balances endocrine and digestive network. It brings good luck and is also regarded as being highly sensual and magnetic. It insures very long enjoyment of the qualities that make the wearer attractive. Amber has long been associated with healing energy and mental stimulation, and is said to balance aggressive traits.