What is a gem that starts with a Z?

Answer 1

Zircon - Zircon has suffered much bad PR due to synthetic stones with the trade name "Cubic Zirconia". In addition to this the use of zircon as a cheap diamond rip-off has led many people to believe that zircon is synthetic or some kind of fake. It is not! Zircon is a wonderful gemstone variety that has much more to offer than all the treated zircon in uniformed colors roaming the jewelry market. Zircon is the most brilliant of all colored gemstone. The brilliance and luster is unbeatable and the high birefringence is most unique. Naturally colored zircon can be green, yellow, brown, (rarely) blue, (very rarely) red and often colorless. In any color he shows a stunning fire and magnificent luster. Mostly very clean and found in good sizes zircon is a yet little known opportunity for novice collectors and experimental jewelry makers. They offer adorable colors and excellent luster for every budget. A light yellow zircon is nearly as fascinating as a fancy diamond. Sri Lanka has for centuries been the best source of gem quality zircons.