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In gemology, chatoyancy (/ ʃ ə ˈ t ɔɪ. ən s i / shə-TOY-ən-see), also called chatoyance or the cat's eye effect, [1] is an optical reflectance effect seen in certain gemstones, woods, and carbon fiber. Coined from the French œil de chat, meaning 'cat's eye'. The chatoyant effect is typically characterized by one or more well-defined ...
Originating from Namibia and China, where it is mined for use as a decorative stone due to its chaotic chatoyancy and brecciated structure. Ranging in colour from brownish-red, to blue-grey, and chatoyant yellow. The Chinese variety are predominantly a reddish-brown, with regions of chatoyant blue and yellow.
Location of San Diego County in California. This is a list of the National Register of Historic Places listings in San Diego County, California.. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in San Diego County, California, United States.
The Cerutti Mastodon site is a paleontological and possible archeological site in San Diego County, California. In 2017, broken mastodon bones at the site were dated to around 130,700 years ago. The bones were found with cobblestones displaying use-wear and impact marks among the otherwise fine-grain sands.
The complex was first identified by Malcolm J. Rogers in 1919 at site SDI-W-240 in Escondido in San Diego County, California. [1] He assigned the Paleo-Indian designation of 'Scraper Makers' to the prehistoric producers of the complex, based on the common occurrence of unifacially flaked lithic (stone) tools at their sites.
Potato Chip Rock is a natural tourist attraction near San Diego, California, [1] named for its resemblance to a potato chip. The rock is thin and cantilevered over 14 feet. [ 2 ] It is located on the summit of Mt. Woodson at an elevation between 2,700 and 2,800 ft, [ 3 ] in an unincorporated part of San Diego County between Poway and Ramona .
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