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Richard T. Liddicoat
Richard T. Liddicoat, Jr. (March 2, 1918 – July 23, 2002) was an American gemologist. Liddicoat was an educator in gemology, who also made contributions in the area of diamond quality grading and gem identification. Liddicoat was the Chairman of the Board of Governors at Gemological Institute of America (GIA). Early life On March 2, 1918, Liddicoat was born as Richard Thomas Liddicoat, Jr. in Kearsarge, Michigan to Richard T. and Carmen Beryl (Williams) Liddicoat. Both of his grandfathers were miners from Cornwall. Education In 1939, Liddicoat earned a bachelor's degree in geology from University of Michigan. In 1940, Liddicoat earned a master's degree in mineralogy from University of Michigan. During World War II, he attended the California Institute of Technology where he obtained a Master's degree in Meteorology in 1944. Career On June 28, 1940, Liddicoat joined the staff of GIA as an Assistant Director of Education. About a year later, in fall 1941, Liddicoat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kearsarge, Michigan
Kearsarge is an unincorporated community in Calumet Township, Houghton County in the U.S. state of Michigan. It is approximately northeast of Calumet/Laurium on U.S. Route 41/ M-26 at . Kearsarge is served by a post office with ZIP code 49942, providing P.O. Box service. History The community was first settled in 1867. An amygdaloid copper lode was mined by various companies from 1882 through 1925. A post office opened on November 20, 1893, with Barnett S. Shearer as the first postmaster. It was named for the USS ''Kearsarge'' (1861) by a former naval officer who was an employee of the Calumet and Hecla Mining Company. It had a station on the Hancock and Calumet Railroad (which became part of Duluth, South Shore and Atlantic Railway). During the Great Depression, workers with the WPA WPA may refer to: Computing *Wi-Fi Protected Access, a wireless encryption standard *Windows Product Activation, in Microsoft software licensing * Wireless Public Alerting (Alert Ready), emerg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Cutting
Diamond cutting is the practice of shaping a diamond from a rough stone into a faceted gem. Cutting diamonds requires specialized knowledge, tools, equipment, and techniques because of its extreme difficulty. The first guild of diamond cutters and polishers (Diamantaire) was formed in 1375 in Nuremberg, Germany, and led to the development of various types of "cut". This has two meanings in relation to diamonds. The first is the shape: square, oval, and so on. The second relates to the specific quality of cut within the shape, and the quality and price will vary greatly based on the cut quality. Since diamonds are one of the hardest materials, special diamond-coated surfaces are used to grind the diamond down. The first major development in diamond cutting came with the "Point Cut" during the later half of the 14th century: the Point Cut follows the natural shape of an octahedral rough diamond crystal, eliminating some waste in the cutting process. Diamond cutting, as well as overa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologist
A geologist is a scientist who studies the solid, liquid, and gaseous matter that constitutes Earth and other terrestrial planets, as well as the processes that shape them. Geologists usually study geology, earth science, or geophysics, although backgrounds in physics, chemistry, biology, and other sciences are also useful. Field research (field work) is an important component of geology, although many subdisciplines incorporate laboratory and digitalized work. Geologists can be classified in a larger group of scientists, called geoscientists. Geologists work in the energy and mining sectors searching for natural resources such as petroleum, natural gas, precious and base metals. They are also in the forefront of preventing and mitigating damage from natural hazards and disasters such as earthquakes, volcanoes, tsunamis and landslides. Their studies are used to warn the general public of the occurrence of these events. Geologists are also important contributors to climate ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mineralogy
Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Specific studies within mineralogy include the processes of mineral origin and formation, classification of minerals, their geographical distribution, as well as their utilization. History Early writing on mineralogy, especially on gemstones, comes from ancient Babylonia, the ancient Greco-Roman world, ancient and medieval China, and Sanskrit texts from ancient India and the ancient Islamic world. Books on the subject included the ''Naturalis Historia'' of Pliny the Elder, which not only described many different minerals but also explained many of their properties, and Kitab al Jawahir (Book of Precious Stones) by Persian scientist Al-Biruni. The German Renaissance specialist Georgius Agricola wrote works such as '' De re metallica'' (''On Metals'', 1556) and ''De Natura Fossilium'' ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeweler
A bench jeweler is an artisan who uses a combination of skills to make and repair jewelry. Some of the more common skills that a bench jeweler might employ include antique restoration, silversmith, Goldsmith, stone setting, engraving, fabrication, wax carving, lost-wax casting, electroplating, forging, and polishing. Jewelry manufacture In general, an original design is made and sold using processes such as molding, casting, stamping and similar techniques. The other is original, one of a kind work. The bench jeweler will be a factor in many facets of the process, depending on what is needed and the skills of the worker. When a production piece is contemplated, it may go through a design process that can range from one person with an idea to a full-scale planning stage involving teams of artists and marketing professionals. Eventually, that design will need to be made into a real piece of metal jewelry, which is generally called a model, and the worker who makes it is gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond
Diamond is a Allotropes of carbon, solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the Chemical stability, chemically stable form of carbon at Standard conditions for temperature and pressure, room temperature and pressure, but diamond is metastable and converts to it at a negligible rate under those conditions. Diamond has the highest Scratch hardness, hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth. Because the arrangement of atoms in diamond is extremely rigid, few types of impurity can contaminate it (two exceptions are boron and nitrogen). Small numbers of lattice defect, defects or impurities (about one per million of lattice atoms) color diamond blue (bor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Research Center
Center or centre may refer to: Mathematics *Center (geometry), the middle of an object * Center (algebra), used in various contexts ** Center (group theory) ** Center (ring theory) * Graph center, the set of all vertices of minimum eccentricity Places United States * Centre, Alabama * Center, Colorado * Center, Georgia * Center, Indiana * Center, Jay County, Indiana * Center, Warrick County, Indiana * Center, Kentucky * Center, Missouri * Center, Nebraska * Center, North Dakota * Centre County, Pennsylvania * Center, Portland, Oregon * Center, Texas * Center, Washington * Center, Outagamie County, Wisconsin * Center, Rock County, Wisconsin **Center (community), Wisconsin *Center Township (other) *Centre Township (other) *Centre Avenue (other) *Center Hill (other) Other countries * Centre region, Hainaut, Belgium * Centre Region, Burkina Faso * Centre Region (Cameroon) * Centre-Val de Loire, formerly Centre, France * Centre (department), Ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Educational Institution
An educational institution is a place where people of different ages gain an education, including preschools, childcare, primary-elementary schools, secondary-high schools, and universities. They provide a large variety of learning environments and learning spaces. Types of educational institution Types of educational institution include: Early childhood * Preschool * Kindergarten * Nursery Primary * Elementary school (grade school), primary school * Middle school (partly) * Comprehensive school Secondary * Secondary school * Comprehensive school * High school * Middle school (partly) * Upper school * Independent school (UK) * Academy (English school) * University-preparatory school * Boarding school * Gymnasium * Hauptschule * Realschule Further and higher education * Gurukula *Academy * College * Career college * Community college * Junior college * Liberal arts college * Madrasah * Residential college * Sixth form college * Technical college or Institute of Technology * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carlsbad, California
Carlsbad is a coastal city in the North County region of San Diego County, California, United States. The city is south of downtown Los Angeles and north of downtown San Diego. As of the 2020 census, the population of the city was 114,746. Carlsbad is a popular tourist destination and home to many businesses in the golf industry. History Carlsbad's history began with the Luiseño people (the Spanish name given to them because of their proximity to Mission San Luis Rey), as well as some Kumeyaay in the La Costa area. Nearly every reliable fresh water creek had at least one native village, including one called Palamai. The site is located just south of today's Buena Vista Lagoon. The first European land exploration of Alta California, the Spanish Portolá expedition of 1769, met native villagers while camped on Buena Vista Creek. Another Luiseño villages within today's city of Carlsbad was a village at the mouth of the San Marcos Creek that the Kumeyaay called 'Ajopunq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Home Study Council
The Distance Education Accrediting Commission (DEAC), formerly the National Home Study Council and then as the Distance Education and Training Council, is a non-profit national educational accreditation agency in the United States specializing in the accreditation of (51 percent or more) distance education programs of study and institutions. The United States Department of Education, U.S. Department of Education identifies DEAC to be among the recognized institutional accrediting agencies in the U.S. that are reliable authorities on the quality of education offered by the institutions they accredit. History The DEAC was established in 1926 as the National Home Study Council (NHSC), a trade association for correspondence schools.Michael G. Moore and William George Anderson (2003), Handbook of Distance Education', Lawrence Erlbaum Associates, Mahwah, NJ. . p. 39 Its formation was in response to a Carnegie Corporation study that found a lack of standards to ensure quality in correspo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Britain
Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is dominated by a maritime climate with narrow temperature differences between seasons. The 60% smaller island of Ireland is to the west—these islands, along with over 1,000 smaller surrounding islands and named substantial rocks, form the British Isles archipelago. Connected to mainland Europe until 9,000 years ago by a landbridge now known as Doggerland, Great Britain has been inhabited by modern humans for around 30,000 years. In 2011, it had a population of about , making it the world's third-most-populous island after Java in Indonesia and Honshu in Japan. The term "Great Britain" is often used to refer to England, Scotland and Wales, including their component adjoining islands. Great Britain and Northern Ireland now constitute the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles
Los Angeles ( ; es, Los Ángeles, link=no , ), often referred to by its initials L.A., is the largest city in the state of California and the second most populous city in the United States after New York City, as well as one of the world's most populous megacities. Los Angeles is the commercial, financial, and cultural center of Southern California. With a population of roughly 3.9 million residents within the city limits , Los Angeles is known for its Mediterranean climate, ethnic and cultural diversity, being the home of the Hollywood film industry, and its sprawling metropolitan area. The city of Los Angeles lies in a basin in Southern California adjacent to the Pacific Ocean in the west and extending through the Santa Monica Mountains and north into the San Fernando Valley, with the city bordering the San Gabriel Valley to it's east. It covers about , and is the county seat of Los Angeles County, which is the most populous county in the United States with an estim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
