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Agate (/ ˈ æ ɡ ɪ t / AG-it) is a variety of chalcedony, [1] which comes in a wide variety of colors. Agates are primarily formed within volcanic and metamorphic rocks.The ornamental use of agate was common in ancient Greece, in assorted jewelry and in the seal stones of Greek warriors, [2] while bead necklaces with pierced and polished agate date back to the 3rd millennium BCE in the Indus ...
The Lake Superior agate is noted for its rich red, orange, and yellow coloring. This color scheme is caused by the oxidation of iron. Iron leached from rocks provides the pigment that gives the gemstone its beautiful array of colors. The concentration of iron and the amount of oxidation determine the color within or between an agate's bands.
Fordite, also known as Detroit agate, Motor City agate, [1] paint rock, or paint slag, [2] is a lapidarist term for polished pieces of finely layered paint masses from automobile factories. The masses consist of automotive paint which has hardened sufficiently to be cut and polished.
Agate is a variety of chalcedony characterized by either transparency or color patterns, such as multi-colored curved or angular banding. Opaque varieties are sometimes referred to as jasper . [ 4 ] Fire agate shows iridescent phenomena on a brown background; iris agate shows exceptional iridescence when light (especially pinpointed light) is ...
The Fairburn Agate is a type of gemstone found in the agate beds of Southwestern South Dakota and Northwestern Nebraska. It is also the state gemstone of South Dakota. [ 1 ] Fairburns are characterized from other types of agate by their colors and the shape of the bands.
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Find out the history and fun facts behind Thanksgiving's most common colors which are orange, red, brown and yellow, along with fascinating Turkey Day trivia.
Moss agate pebble, 1 inch (25 mm) long Montana moss agate. Moss agate is a semi-precious gemstone formed from silicon dioxide.It is a form of chalcedony which includes minerals of a green color embedded in the stone, forming filaments and other patterns suggestive of moss. [1]