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.
While most popular in blue, zircon also occurs as orange stones. These orange crystals come from the variety of zircon called hyacinth, which is the birthstone for January in the Old Italian and Russian calendar. In astrology, zircon is associated with the zodiac sign Virgo.range Topaz. Beside yellow and blue, topaz also occurs as orange stones. These orange gemstones come from two varieties of topaz, namely, precious topaz and imperial topaz, which is a pinkish orange and the more valuable of the two. Topaz is the traditional and modern birthstone for November.