Search results
Results from the WOW.Com Content Network
The Ministry of Mineral Resources (MMR) in Sierra Leone is responsible for the management of minerals in accordance with the Mines and Minerals Act 2009. [1] Concessions for industrial mining (exploration and large-scale mining) is managed by the Mining Cadastre Office (MCO) in Freetown, while all artisanal mining licenses are managed by the MMR Regional Offices located in Bo, Kenema, Makeni ...
Diamond type is a method of scientifically classifying diamonds by the level and type of their chemical impurities. Diamonds are separated into five types: Type IaA, Type IaB, Type Ib, Type IIa, and Type IIb. The impurities measured are at the atomic level within the crystal lattice of carbon atoms and so, unlike inclusions, require an infrared ...
Lesedi La Rona, formerly known in media as Karowe AK6 or as Quad 1[1] by the personnel at the mine, [not verified in body] is the fifth-largest diamond ever found, and the third-largest of gem quality. It was found in the Karowe mine, (formerly called AK6) in Botswana on 16 November 2015. British jeweller Graff bought the rough diamond for $53 ...
DNA mismatch repair (MMR) is a system for recognizing and repairing erroneous insertion, deletion, and mis-incorporation of bases that can arise during DNA replication and recombination, as well as repairing some forms of DNA damage. [1][2] Mismatch repair is strand-specific. During DNA synthesis the newly synthesised (daughter) strand will ...
The diamond was recovered in April 2019 by the Lucara Diamond Corp in its Karowe diamond mine in Botswana. The diamond is 1,758 carats and weighs 352 grams or 12.39 oz. [1] At the time it was found, Sewelô was the largest diamond in Botswana's history, surpassing the 1,111 carats (222 g, 7.83 oz.) Lesedi La Rona extracted at the same mine on ...
Diamond is a good electrical insulator, having a resistivity of 100 GΩ⋅m to 1 EΩ⋅m [32] (1.0 × 10 11 – 1.0 × 10 18 Ω⋅m), and is famous for its wide bandgap of 5.47 eV. High carrier mobilities [ 33 ] and high electric breakdown field [ 34 ] at room temperature are also important characteristics of diamond.
Lonsdaleite (named in honour of Kathleen Lonsdale), also called hexagonal diamond in reference to the crystal structure, is an allotrope of carbon with a hexagonal lattice, as opposed to the cubical lattice of conventional diamond. It is found in nature in meteorite debris; when meteors containing graphite strike the Earth, the immense heat and ...
An isotopical pure diamond is a type of diamond that is composed entirely of one isotope of carbon. Isotopically pure diamonds have been manufactured from either the more common carbon isotope with mass number 12 (abbreviated as 12 C) or the less common 13 C isotope. Compared to natural diamonds that are composed of a mixture of 12 C and 13 C ...