Primary Deposit
When a gem or mineral is found resident in its original host or mother rock.
Polisher
A person who cuts and polishes a variety of gemstones and minerals.
Primary deposit: When a gem (or mineral) is found resident in its original rock.
Refraction: In gems, the bending of light as it enters the stone and slows down.
Primary Deposits:
A primary deposit is one in which the sought-after material is still held within the original site of its formation.
primary deposits Rough diamonds that have been found in kimberlite forced near the surface by volcanic action are considered primary deposits. Also see alluvial deposits.
Primary Deposits. The classic primary occurrence of jadeite is on the plateau at Tawmaw. This area has been worked for over a hundred years and is said by miners to have produced all color varieties of jadeite.
Also known as primary deposits, host rock mining is the chipping of gems from the rock in which they formed or are hosted. Crystals from these deposits are extracted from their host rock by hand tools, pneumatic tools and even explosives.
Diamond production of primary deposits (kimberlites and lamproites) only started in the 1870's after the discovery of the Diamond fields in South Africa. Production has increased over time and now an accumulated total of 4.
Highly rare form of igneous rock that may host diamonds in primary deposits.
Laser drilling
Diamond enhancement process that involves drilling a hole into diamonds with the aid of laser beam to remove inclusions.
Thanks to climate change the actual primary deposit nowadays is free of ice for about 4 - 6 months a year.
The explosion creates a very deep, wide hole called a "pipe" into which most of the diamonds settle; these deposits of diamonds are known as primary deposits.
Ruby occurs in metamorphic rocks, diplomatic marble and gneiss. Usually corundum mined from secondary alluvial deposits. Very rarely, it is mined from primary deposits.
Some of the mines that have produced the greatest specimens of gem crystal tourmaline and aquamarine are the primary deposits of Araçuaí, Corrego do Urucum, Cruzeiro, Golconda, Jonas, Limoeiro, Medina, Pedra Azul and Xanda.
Colours are a variety of blues, clear, pink, orange, yellow, green, purple, and black. These stones can be found in primary deposits in Australia, Myanmar, Sri Lanka, and Thailand. Read more in our Gemstones & Minerals Glossary ...
 See also: Color, Crystal, Stone, Rough, Gemstone
  
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