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The weight retention analysis studies the diamond rough to find the best combination of finished stones as it relates to per carat value. For instance, a 2.20-carat (440 mg) octahedron may produce (i) either two half-carat (100 mg) diamonds whose combined value may be higher than that of (ii) a 0.80-carat (160 mg) diamond plus a 0.30-carat (60 ...
The Kimberley Process Certification Scheme (KPCS) is the process established in 2003 to prevent "conflict diamonds" from entering the mainstream rough diamond market by United Nations General Assembly Resolution 55/56 following recommendations in the Fowler Report. The process was set up "to ensure that diamond purchases were not financing ...
The fish should be well conditioned beforehand with nutritious food, preferably small live foods. Soft acidic water in the pH range of 5.5–6.5 is preferred, and a temperature of around 26–29 °C (79–84 °F) is suitable. The fish usually spawn in the early morning. If not removed from the tank, the adults will eat their eggs.
Mining industry of Botswana. The Jwaneng diamond mine, the second largest in the world, [1] and richest by value. [2] The mining industry of Botswana has dominated the national economy of Botswana since the 1970s, being a primary sector industry. [3] Diamond has been the leading component of the mineral sector ever since production of gems ...
This 16th-century fish stall shows many traditional fish products. The term fish processing refers to the processes associated with fish and fish products between the time fish are caught or harvested, and the time the final product is delivered to the customer. Although the term refers specifically to fish, in practice it is extended to cover ...
Marange is estimated to have produced 12 million carats in 2012, 8.7 million carats in 2011, and 8.2 million carats in 2010. [3] While some diamond mines produce rough valued at over $1000 per carat, average production at Marange is estimated at under $50 per carat. [4]
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 ...
Category. Commons. Diamond clarity is the quality of diamonds that relates to the existence and visual appearance of internal characteristics of a diamond called inclusions, and surface defects, called blemishes. Clarity is one of the four Cs of diamond grading, the others being carat, color, and cut . Inclusions are solids, liquids, or gases ...