Turquoise - December birthday gemstone
Turquoise is the accepted birthstone for December and is the accepted anniversary gemstone for the eleventh year of marriage.
Colors in turquoise range from sky blue (most desirable color) to blue green and apple green.
The name means 'Turkish stone' because the trade route that brought it to Europe used to come via Turkey. The best qualities are found in northeast Iran (Persian turquoise). However, the United States southwest is now the world leader in production.
The deposits in Sinai were already worked out by 4000 BC. At that time, the stone was used for jewelry, amulets and in the preparation of cosmetics.
During the sixteenth century turquoise was used as currency by the southwestern Indians. They believed the gemstone could bring spoils to the warrior, animals to the hunter, and happiness and good fortune to all.
Although large quantities of beautiful turquoise that have not been color enhanced are available, today's turquoise is commonly stabilized with plastic to improve its color and durability. Chalky varieties of turquoise are normally impregnated with oil or wax to enhance color. This color change may not be permanent
Care should be taken to protect it from scratches, sharp blows, hot water, and household chemicals. Do not use a home ultrasonic machine.
Blue topaz has become a popular alternative in recent years for those who prefer faceted stones.