Turquoise is an opaque, semiprecious stone in various shades of green and blue. This gem stone occurs in rock deposits and its name means Turkish stone.
• Small quantities of iron give turquoise a greenish tint
• Turquoise has been praised as a favorite gem for thousands of years
• Turquoise is possibly the most widely used of all gem minerals
• A small amount of copper gives the stone its blue color seeming to reflect the sky
More information on this semi-precious stone is available from Novica & Wikipedia