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Moonstone cabochon. The most common moonstone is of the orthoclase feldspar mineral adularia, named for an early mining site near Mt. Adular in Switzerland, now the town of St. Gotthard. [1] [better source needed] A solid solution of the plagioclase feldspar oligoclase +/− the potassium feldspar orthoclase also produces moonstone specimens.
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
Belomorite is a spectacular, inexpensive and popular ornamental stone; it is used in jewelry as one of the varieties of “moonstone”. It is typically cut into cabochons , often double-sided, convex in both directions, thus enhancing its brilliance, unlike, say, similar labradorite , which is often cut into flat plates cut parallel to the ...
The Rumford Archaeological Sites are a collection of prehistoric Native American sites in the vicinity of the Androscoggin River near Rumford, Maine.These six sites provide a window of observation into the movements and practices of Native Americans from c. 7,000 BCE (the early Archaic period) to the Late Woodland period and contact with Europeans.
The Willard Brook Quarry is a prehistoric stone quarry site in a remote portion of Piscataquis County, Maine.The quarry site is located on one of a series of outcrops near Munsungan Lake in north-central Maine, all of which have yielded stone tools found at prehistoric sites throughout northern New England.
A belt of Ordovician-Silurian rocks extends from Kittery to northeast of Bangor, with sandstone and slate in the east and gneiss and schist in the southwest. From southwest of Augusta to just south of Houlton, extending to the Canadian border are Silurian rocks, also found in a small area near Machias along the coast and in smaller areas further north.
An estimated 40,000 bees were taken from the walls of a farmhouse at Smiling Hill Farm in Westbrook, Maine, according to CNN affiliate WMTW. The Knight family has managed the farmland since 1720 ...
Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 hide