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Garnet, the birthstone for January. Amethyst, the birthstone for February. Aquamarine, the birthstone for March. Diamond, the birthstone for April. Emerald, the birthstone for May. Pearl, one of three June birthstones. Moonstone, one of three June birthstones. Alexandrite, one of three June birthstones.
Aquamarine (gem) Aquamarine is a pale-blue to light-green variety of the beryl family, [ 2 ] with its name relating to water and sea. [ 3 ] The color of aquamarine can be changed by heat, with a goal to enhance its physical appearance (though this practice is frowned upon by collectors and jewelers). [ 4 ] It is the birth stone of March.
The lithology of a rock unit is a description of its physical characteristics visible at outcrop, in hand or core samples, or with low magnification microscopy. Physical characteristics include colour, texture, grain size, and composition. [ 1][ 2][ 3] Lithology may refer to either a detailed description of these characteristics, or a summary ...
March 22, 1980. ( 1980-03-22) Dismantled date. July 6, 2022. The Georgia Guidestones was a granite monument that stood in Elbert County, Georgia, United States, from 1980 to 2022. It was 19 feet 3 inches (5.87 m) tall and made from six granite slabs weighing a total of 237,746 pounds (107,840 kg). [ 1] The structure was sometimes referred to as ...
Uluru (Ayers Rock) is a large sandstone formation in Northern Territory, Australia.. Sedimentary rocks can be subdivided into four groups based on the processes responsible for their formation: clastic sedimentary rocks, biochemical (biogenic) sedimentary rocks, chemical sedimentary rocks, and a fourth category for "other" sedimentary rocks formed by impacts, volcanism, and other minor processes.
In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed. Rocks form the Earth's outer solid layer, the crust, and most of its interior, except for the liquid outer core and pockets of ...
Plecoptera is an order of insects, commonly known as stoneflies. Some 3,500 species are described worldwide, [ 1] with new species still being discovered. Stoneflies are found worldwide, except Antarctica. [ 2] Stoneflies are believed to be one of the most primitive groups of Neoptera, with close relatives identified from the Carboniferous and ...
Kyanite is an aluminum silicate mineral, with the chemical formula Al2SiO5. It is typically patchy blue in color, though it can range from pale to deep blue [ 6] and can also be gray or white or, infrequently, light green. [ 7] It typically forms sprays of bladed crystals, but is less commonly found as distinct euhedral (well-shaped) crystals ...
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