Recognize the session layer of the OSI model ; List the seven layers of the OSI model ; Discuss the responsibilities, functions and protocols of the session layer ; Specify the six session layer protocols
Currently, the most popular color for this gem is the blue zircon. Most blue zircon, which is considered an alternate birthstone for December, is normally a pastel to medium blue in color, but some exceptional gems have a bright blue color. Beyond blue, Zircon is also available in green, deep red, yellow, brown, and orange.
Zircon may be whitish, yellow, greenish, or violet-blue under X-rays. 1  Red to orange red: inert to strong, yellow to orange (SW). 2  Yellow to orangish yellow: inert to moderate yellow to orange (LW and SW). 3  Green: usually inert.  Blue: inert to moderate, light blue 1  (LW). Brown: inert to very weak red  (SW).