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Novaculite, also called Arkansas Stone, is a microcrystalline to cryptocrystalline rock type that consists of silica in the form of chert or flint. It is commonly white to grey or black in color, with a specific gravity that ranges from 2.2 to 2.5.
The term is based on the word "whet", which means to sharpen a blade, [2] [3] not on the word "wet". The verb nowadays to describe the process of using a sharpening stone for a knife is simply to sharpen, but the older term to whet is still sometimes used, though so rare in this sense that it is no longer mentioned in, for example, the Oxford Living Dictionaries.
A 2010 effort led by State Senator Gloria J. Romero, a Democrat from Los Angeles, sought to remove serpentine from its perch as the state's official stone. Organizations such as the Asbestos Disease Awareness Organization have supported the move as the olive green rock is a source of chrysotile , a form of asbestos that can cause mesothelioma ...
The Fox Pictograph is a prehistoric rock art site in Stone County, Arkansas. Located near the community of Fox, it is one of two documented examples of rock art depicting humans in the state. It is a stick figure, painted in red pigment, with an unusual depiction of ear ornaments. The figure is about 127 centimetres (50 in) in height. [2]
Ganister – Hard, fine-grained quartzose sandstone, or orthoquartzite; Gossan – Intensely oxidized, weathered or decomposed rock; Hyaloclastite – Volcaniclastic accumulation or breccia; Ijolite – Igneous rock consisting essentially of nepheline and augite; Jadeitite – Metamorphic rock found in blueschist-grade metamorphic terranes
Dent Marble (not a "true marble"; Crinoidal limestone) Frosterley Marble – northern England (not a "true marble") Hamstone – Building stone from Somerset; Headington stone – A limestone from Oxford; Hopton Wood stone – Type of limestone; Kentish ragstone, also known as Kentish rag – Hard grey limestone in Kent, England; Ketton stone
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