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List Of Emeralds By Size
This is a list of emeralds by size. Emeralds Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds are highly included, so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate. Emeralds in antiquity were mined in Egypt at locations on Mount Smaragdus since 1500 BCE, and India, and Austria since at least the 14th century CE. The Egyptian mines were exploited on an industrial scale by the Roman and Byzantine Empires, and later by Islamic conquerors. Mining ceased with the discovery of the Colombian deposits; only ruins remain. Colombia is historically an important producer of emeralds, constituting 50–95% of the world production, with the number depending on the year, source and grade. Emerald production in Colombia has increased drastically in the last decade, increasing by 78% fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emerald
Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium or sometimes vanadium.Hurlbut, Cornelius S. Jr., and Kammerling, Robert C. (1991). ''Gemology'', John Wiley & Sons, New York, p. 203, . Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds have many inclusions, so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate. Etymology The word "emerald" is derived (via and ), from Vulgar Latin: ''esmaralda/esmaraldus'', a variant of Latin ''smaragdus'', which was via (smáragdos; "green gem"). The Greek word may have a Semitic, Sanskrit or Persian origin. According to ''Webster's Dictionary'' the term emerald was first used in the 14th century. Properties determining value Emeralds, like all colored gemstones, are graded using four basic parameters known as "the four ''C''s": ''color'', ''clarity,'' ''cut'' and ''carat weight''. Normally, in grading ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bahia Emerald
The Bahia Emerald is one of the largest emeralds and contains the largest single crystal ever found. The stone, weighing approximately 341 kg (752 lbs) (approximately 189,600 carats) originated from Bahia, Brazil; its emerald crystals embedded in black schist. It narrowly escaped flooding during Hurricane Katrina in 2005 during a period of storage in a warehouse in New Orleans. There was an ownership dispute after it was reported stolen in September 2008 from a secured vault in South El Monte, California, South El Monte in Los Angeles County, California. The emerald was located and the case and ownership have been settled. The stone has been valued at some $400 million, but the true value is unclear. History It originally was mined in 2001, in the beryl mining, mines of north Bahia, Brazil, from which it takes its name. ''Bahia'' is an archaic form of Portuguese language, Portuguese ''baía'', meaning 'bay' after the bay first seen by European explorers in the 16th century. After ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Sapphires By Size
This is a list of sapphires by size. Sapphire Sapphires are a precious gemstone, a variety of the mineral corundum, consisting of aluminum oxide () with trace amounts of elements such as iron, titanium, chromium, copper, or magnesium. It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors. The only color corundum stone that the term sapphire is not used for is red, which is called a ruby. Pink colored corundum may be either classified as ruby or sapphire depending on locale. Commonly, natural sapphires are cut and polished into gemstones and worn in jewellery, jewelry. They also may be created synthetically in laboratories for industrial or decorative purposes in large boule (crystal), crystal boules. Because of the remarkable hardness of sapphires – 9 on the Mohs scale of mineral hardness, Mohs scale (the third hardest mineral, after diamond at 10 and moissanite at 9.5) – sapphir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Gold Nuggets By Size
Gold nuggets of various sizes have been found throughout the world. Historically, the nuggets are melted down and formed into new objects. The Welcome Stranger is the largest alluvial gold nugget ever found, which had a calculated refined weight of . Three of the biggest nuggets come from the Brazilian Serra Pelada mine. Most of the largest nuggets were melted down into ingots and so only have historical records of their size and mass. Formation A gold nugget is a naturally occurring piece of native gold. Watercourses often concentrate nuggets and finer gold in placers. Nuggets are recovered by placer mining, but they are also found in residual deposits where the gold-bearing veins or lodes are weathered. Nuggets are also found in the tailings piles of previous mining operations, especially those left by gold mining dredges. Nuggets are gold fragments weathered out of an original lode. They often show signs of abrasive polishing by stream action, and sometimes still contai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Museum Of Natural History
The American Museum of Natural History (AMNH) is a natural history museum on the Upper West Side of Manhattan in New York City. Located in Theodore Roosevelt Park, across the street from Central Park, the museum complex comprises 21 interconnected buildings housing 45 permanent exhibition halls, in addition to a planetarium and a library. The museum collections contain about 32 million specimens of plants, animals, fungi, fossils, minerals, rocks, meteorites, human remains, and human cultural artifacts, as well as specialized collections for frozen tissue and genomic and astrophysical data, of which only a small fraction can be displayed at any given time. The museum occupies more than . AMNH has a full-time scientific staff of 225, sponsors over 120 special field expeditions each year, and averages about five million visits annually. The AMNH is a private 501(c)(3) organization. The naturalist Albert S. Bickmore devised the idea for the American Museum of Natural History in 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Museum Of Islamic Art, Doha
The Museum of Islamic Art (MIA; ) is a museum on one end of the Corniche in Doha, Qatar. As per the architect I. M. Pei's specifications, the museum is built on an island off an artificial projecting peninsula near the traditional '' dhow'' harbor. A purpose-built park surrounds the edifice on the eastern and southern facades while two bridges connect the southern front facade of the property with the main peninsula that holds the park. The western and northern facades are marked by the harbor showcasing the Qatari seafaring past. In September 2017, Qatar Museums appointed Julia Gonnella as director of MIA. In 2024 Julia Gonnella became director of the Lusail Museum and was replaced by Shaika Nasser Al-Nassr. In November 2022 the MIA became the first carbon-neutral certified museum in the Middle East. The museum participated in the Expo 2023 Doha from October 2023 until March 2024, with workshops and events focusing on biodiversity and sustainability. Facilities The museum h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mogul Mughal Emerald
The Mogul Mughal Emerald is one of the largest emeralds known. Auction house Christie's described it as follows: The rectangular-cut emerald known as 'The Mogul Mughal' weighing 217.80 carats, the obverse engraved with Shi'a invocations in elegant naskh script, dated 1107 A.H., the reverse carved all over with foliate decoration, the central rosette flanked by single large poppy flowers, with a line of three smaller poppy flowers either side, the bevelled edges carved with cross pattern incisions and herringbone decoration, each of the four sides drilled for attachments, . Originally mined in Colombia, it was sold in India, where emeralds were much desired by the rulers of the Mughal Empire. The Mogul Mughal is unique among Mughal emeralds in bearing a date – 1107 A.H. (1695–1696 AD) – which is within the reign of Aurangzeb, the sixth emperor. However, the Mughal rulers were Sunni, whereas the inscription – a heterodox ''Salawat'' dedicated to Hassan ibn Ali and Husayn ib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gachalá Emerald
The Gachalá Emerald, one of the most valuable and famous emeralds in the world, was found in 1967, in the mine called Vega de San Juan, located in Gachala, a town in Colombia, located from Bogota. Gachalá Muisca people#Language, Chibcha means "place of Gacha." Presently the emerald is in the United States, where it was donated to the Smithsonian Institution by the New York City jeweler, Harry Winston. Symbolism The emerald was named in honor of Gachalá, the municipality of Cundinamarca where it was found. Ficha técnica de la Esmeralda Gachalá de la página web oficial del Smithsonian Institution of Washington, (Consulted on 06-19-2011) Characteristics * Shape: Emerald * Color: Intense green * Carats: 858 Carat (mass), Carats * Weight: * Size: * Year of extraction: 1967 Conservation The emerald is part of the permanent collection of the Smithsonian Institution in Washington, D.C. It was donated in 1969 by the American jeweler Harry Winston, and is labeled under nu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Museum Of Natural History (France)
The French National Museum of Natural History ( ; abbr. MNHN) is the national natural history museum of France and a of higher education part of Sorbonne University. The main museum, with four galleries, is located in Paris, France, within the Jardin des Plantes on the left bank of the River Seine. It was formally founded in 1793, during the French Revolution, but was begun even earlier in 1635 as the royal garden of medicinal plants. The museum now has 14 sites throughout France. Since the 2014 reform, it has been headed by a chairman, assisted by deputy managing directors. The Museum has a staff of approximately 2,350 members, including six hundred researchers. It is a member of the national network of naturalist collections (RECOLNAT). History 17th–18th century File:Jardin du roi 1636.png, The Royal Garden of Medicinal Plants in 1636 File:Buffon statue dsc00979.jpg, Statue of Georges-Louis Leclerc, Comte de Buffon in the formal garden File:Buffon, Georges Louis - Lecler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural History Museum, London
The Natural History Museum in London is a museum that exhibits a vast range of specimens from various segments of natural history. It is one of three major museums on Exhibition Road in South Kensington, the others being the Science Museum (London), Science Museum and the Victoria and Albert Museum. The Natural History Museum's main frontage, however, is on Cromwell Road. The museum is home to life and earth science specimens comprising some 80 million items within five main collections: botany, entomology, mineralogy, palaeontology and zoology. The museum is a centre of research specialising in Taxonomy (biology), taxonomy, identification and conservation. Given the age of the institution, many of the collections have great historical as well as scientific value, such as specimens collected by Charles Darwin. The museum is particularly famous for its exhibition of dinosaur skeletons and ornate architecture—sometimes dubbed a ''cathedral of nature''—both exemplified by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duke Of Devonshire Emerald
The Duke of Devonshire Emerald is one of the world's largest and most famous uncut emeralds, weighing . Originating in the mine at Muzo, Colombia, it was either gifted or sold by Emperor Pedro I of Brazil to William Cavendish, 6th Duke of Devonshire in 1831. It was displayed at the Great Exhibition in London in 1851, and more recently at the Natural History Museum in 2007. Some say the stone housed in the museum is a replica, but the stone currently on display is indeed the real one. It is currently on a long term loan from the Duke of Devonshire. See also * Colombian emeralds * Muzo * List of individual gemstones * List of emeralds by size This is a list of emeralds by size. Emeralds Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most eme ... References Individual emeralds Colombian emeralds {{gemology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
