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The Statue of Liberty, showing advanced patination; verdigris is responsible for the statue's iconic green colour.. Verdigris (/ ˈ v ɜːr d ɪ ɡ r iː (s)/) [1] is a common name for any of a variety of somewhat toxic [2] [3] [4] copper salts of acetic acid, which range in colour from green to a bluish-green depending on their chemical composition.
Malachite is a copper carbonate hydroxide mineral, with the formula Cu 2 CO 3 (OH) 2.This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids provide the means for chemical precipitation.
Dioptase is an intense emerald-green to bluish-green mineral that is cyclosilicate of copper. It is transparent to translucent. Its luster is vitreous to sub-adamantine. Its formula is Cu 6 Si 6 O 18 ·6H 2 O, also reported as CuSiO 2 (OH) 2. It has a Mohs hardness of 5, the same as tooth enamel.
Kentucky (US: / k ə n ˈ t ʌ k i / ⓘ, UK: / k ɛ n-/), [5] officially the Commonwealth of Kentucky, [c] is a landlocked state in the Southeastern region of the United States. It borders Illinois, Indiana, and Ohio to the north, West Virginia to the northeast, Virginia to the east, Tennessee to the south, and Missouri to the west.
Kentucky's regions (click on image for color-coding information) Kentucky can be divided into five primary regions: the Cumberland Plateau in the east, which contains much of the historic coal mines; the north-central Bluegrass region, where the major cities and the state capital (Frankfort) are located; the south-central and western Pennyroyal Plateau (also known as the Pennyrile or ...
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U.S. Census Bureau regions and divisions. Since 1950, the United States Census Bureau defines four statistical regions, with nine divisions. [1] [2] The Census Bureau region definition is "widely used... for data collection and analysis", [3] and is the most commonly used classification system.
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