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Bowenite
Bowenite is a hard, compact variety of the serpentinite species antigorite, (Mg3(OH)O4Si2O5). Classed as semi-precious gemstone it has been used for tools, weapons and jewellery by the Māori in New Zealand, and for jewellery by Fabergé. Deposits are found in several places around the world including Afghanistan, China, New Zealand, South Africa and the United States. It typically ranges in colour from dark green to light olive green, and in shades approaching yellow. Bowenite was named by James D. Dana in 1850 after George T. Bowen, who analyzed it in 1822. Together with nephrite jade the Māori class bowenite as pounamu, which is also known as ''greenstone'', and is of particular significance to the Ngāi Tahu iwi on whose traditional lands on the South Island of New Zealand most deposits are found. Historically it was used for tools, weapons and ornaments, although modern use is limited to jewellery, such as Tiki. The South Island deposits are legally protected, and taking ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serpentine Group
Serpentine subgroup (part of the kaolinite-serpentine group in the category of phyllosilicates) are greenish, brownish, or spotted minerals commonly found in serpentinite. They are used as a source of magnesium and asbestos, and as decorative stone. The name comes from the greenish colour and smooth or scaly appearance from the Latin , meaning "serpent rock". Serpentine subgroup is a set of common rock-forming hydrous magnesium iron phyllosilicate () minerals, resulting from the metamorphism of the minerals that are contained in mafic to ultramafic rocks. They may contain minor amounts of other elements including chromium, manganese, cobalt or nickel. In mineralogy and gemology, serpentine may refer to any of the 20 varieties belonging to the serpentine subgroup. Owing to admixture, these varieties are not always easy to individualize, and distinctions are not usually made. There are three important mineral polymorphs of serpentine: antigorite, lizardite and chrysotile. Serpen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pounamu
Pounamu is a term for several types of hard and durable stone found in southern New Zealand. They are highly valued in New Zealand, and carvings made from pounamu play an important role in Māori culture. Name The Māori word , also used in New Zealand English, refers to two main types of green stone valued for carving: nephrite jade, classified by Māori as , , , and other names depending on colour; and translucent bowenite, a type of serpentine, known as . The collective term pounamu is preferred, as the other names in common use are misleading, such as New Zealand jade (not all pounamu is jade) and greenstone (a generic term used for unrelated stone from many countries). Pounamu is only found in New Zealand, whereas much of the carved "greenstone" sold in souvenir shops is jade sourced overseas. The Māori classification of pounamu is by colour and appearance; the shade of green is matched against a colour found in nature, and some hues contain flecks of red or brow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Mineral
Leaders of states in the U.S. which have significant mineral deposits often create a state mineral, rock, stone or gemstone to promote interest in their natural resources, history, tourism, etc. Not every state has an official state mineral, rock, stone and/or gemstone, however. In the chart below, a year which is listed within parentheses represents the year during which that mineral, rock, stone or gemstone was officially adopted as a state symbol or emblem. Table of minerals, rocks, stones and gemstones See also * Lists of U.S. state insignia * List of U.S. state fossils Endnotes References External links {{DEFAULTSORT:List Of U.S. State Minerals, Rocks, Stones And Gemstones Lists of United States state symbols, Minerals Gemstone-related lists, U.S. state minerals, rocks, stones and gemstones Minerals, U.S. state symbols Lists of rocks, U.S. state symbols Geology of the United States by state, .U.S. state symbols ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hei-tiki
The hei-tiki () is an ornamental pendant of the Māori of New Zealand. Hei-tiki are usually made of pounamu ( greenstone), and are considered a taonga (treasure) by Māori. They are commonly called ''tiki'' by New Zealanders, a term that originally refers to large human figures carved in wood and to the small wooden carvings used to mark sacred places. (The word ''hei'' in Māori can mean "to wear around the neck".) Retailers sell tourist versions of hei-tiki throughout New Zealand—these can be made from jade, other types of stone, plastic, or other materials. Origins and materials One theory of the origin of the hei-tiki suggests a connection with Tiki, the first man in Māori legend. According to Horatio Gordon Robley, there are two main ideas behind the symbolism of hei-tiki: they are either memorials to ancestors, or represent the goddess of childbirth, Hineteiwaiwa. The rationale behind the first theory is that they were often buried when their kaitiaki (guardian) di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pounamu Pendant
Pounamu is a term for several types of hard and durable stone found in southern New Zealand. They are highly valued in New Zealand, and hardstone carving, carvings made from pounamu play an important role in Māori culture. Name The Māori language, Māori word , also used in New Zealand English, refers to two main types of green stone valued for carving: nephrite jade, classified by Māori as , , , and other names depending on colour; and translucent bowenite, a type of Serpentine subgroup, serpentine, known as . The collective term pounamu is preferred, as the other names in common use are misleading, such as New Zealand jade (not all pounamu is jade) and greenstone (a generic term used for unrelated stone from many countries). Pounamu is only found in New Zealand, whereas much of the carved "greenstone" sold in souvenir shops is jade sourced overseas. The Māori people, Māori classification of pounamu is by colour and appearance; the shade of green is matched against ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antigorite
Antigorite is a lamellated, monoclinic mineral in the phylosilicate serpentine subgroup with the ideal chemical formula of (Mg,Fe2+)3Si2O5(OH)4. It is the high-pressure polymorph of serpentine and is commonly found in metamorphosed serpentinites. Antigorite, and its serpentine polymorphs, play an important role in subduction zone dynamics due to their relative weakness and high weight percent of water (up to 13 weight % H2O). It is named after its type locality, the Geisspfad serpentinite, Valle Antigorio in the border region of Italy/Switzerland and is commonly used as a gemstone in jewelry and carvings. Geologic occurrences Antigorite is found in low-temperature, high-pressure (or high-deformation) environments, including both extensional and compressional tectonic regimes. Serpentines are commonly found in the ultramafic greenschist facies of subduction zones, and are visible on the Earth's surface through secondary exhumation. Serpentinites that contain antigorite are usu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phyllosilicates
Silicate minerals are rock-forming minerals made up of silicate groups. They are the largest and most important class of minerals and make up approximately 90 percent of Earth's crust. In mineralogy, silica (silicon dioxide, ) is usually considered a silicate mineral. Silica is found in nature as the mineral quartz, and its polymorphs. On Earth, a wide variety of silicate minerals occur in an even wider range of combinations as a result of the processes that have been forming and re-working the crust for billions of years. These processes include partial melting, crystallization, fractionation, metamorphism, weathering, and diagenesis. Living organisms also contribute to this geologic cycle. For example, a type of plankton known as diatoms construct their exoskeletons ("frustules") from silica extracted from seawater. The frustules of dead diatoms are a major constituent of deep ocean sediment, and of diatomaceous earth. General structure A silicate mineral is generally an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suzhou
Suzhou (; ; Suzhounese: ''sou¹ tseu¹'' , Mandarin: ), alternately romanized as Soochow, is a major city in southern Jiangsu province, East China. Suzhou is the largest city in Jiangsu, and a major economic center and focal point of trade and commerce. Administratively, Suzhou is a prefecture-level city with a population of 6,715,559 in the city proper, and a total resident population of 12,748,262 as of the 2020 census in its administrative area. The city jurisdiction area's north waterfront is on a lower reach of the Yangtze whereas it has its more focal south-western waterfront on Lake Tai – crossed by several waterways, its district belongs to the Yangtze River Delta region. Suzhou is now part of the Greater Shanghai metro area, incorporating most of Changzhou, Wuxi and Suzhou urban districts plus Kunshan and Taicang, with a population of more than 38,000,000 residents as of 2020. Its urban population grew at an unprecedented rate of 6.5% between 2000 and 2014, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhode Island
Rhode Island (, like ''road'') is a U.S. state, state in the New England region of the Northeastern United States. It is the List of U.S. states by area, smallest U.S. state by area and the List of states and territories of the United States by population, seventh-least populous, with slightly fewer than 1.1 million residents 2020 United States census, as of 2020, but it is the List of U.S. states by population density, second-most densely populated after New Jersey. It takes its name from Aquidneck Island, the eponymous island, though most of its land area is on the mainland. Rhode Island borders Connecticut to the west; Massachusetts to the north and east; and the Atlantic Ocean to the south via Rhode Island Sound and Block Island Sound. It also shares a small maritime border with New York (state), New York. Providence, Rhode Island, Providence is its capital and most populous city. Native Americans lived around Narragansett Bay for thousands of years before English settler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Southland Times
''The Southland Times'' is the regional daily paper for Southland, including Invercargill, and neighbouring parts of Otago, in New Zealand. It is now owned by media business Stuff Ltd, formerly the New Zealand division of Fairfax Media. History ''The Southland Times'' was first established in 1862. The first edition was published on 12 November 1862 under the title of ''Invercargill Times''. The three founders were Gerard George Fitzgerald, John T. Downes, and Charles Reynolds. The name changed to ''The Southland Times'' in June 1864. Initially, it was published two or three times a week until it became a daily paper in 1875. From 1869 until its purchase by the INL (Independent Newspapers Limited), it was owned by the Gilmour family. Robert Gilmour became a part owner in 1869–70, and then in 1879 became the sole owner of the paper. In 1972, digital computers and software, phototypesetters, and a Japanese APR photopolymer plate were installed at the paper, making the ''Times ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jade
Jade is a mineral used as jewellery or for ornaments. It is typically green, although may be yellow or white. Jade can refer to either of two different silicate minerals: nephrite (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite (a silicate of sodium and aluminium in the pyroxene group of minerals). Jade is well known for its ornamental use in East Asian, South Asian, and Southeast Asian art. It is commonly used in Latin America, such as Mexico and Guatemala. The use of jade in Mesoamerica for symbolic and ideological ritual was influenced by its rarity and value among pre-Columbian Mesoamerican cultures, such as the Olmecs, the Maya, and other ancient civilizations of the Valley of Mexico. Etymology The English word ''jade'' is derived (via French and Latin 'flanks, kidney area') from the Spanish term (first recorded in 1565) or 'loin stone', from its reputed efficacy in curing ailments of the loins and kidneys. ''Nephrite'' is der ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
