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.
December Birthstone: Blue Topaz. December Birthstone Color is Blue. The traditional December birthstone is the Blue Zircon, but there are various alternatives that are considered representative of December including turquoise, blue topaz and tanzanite. Blue Zircon is a natural gem (not to be confused with synthetic cubic zirconia) that is found in several places and mined primarily in Thailand, Cambodia and Vietnam.