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Only 20% of all diamonds mined qualify as gemstones, the remainder are used by industry to harden and sharpen tools.
Gemstone-quality diamonds are valued by these properties: clarity -- the lack of visible flaws in the stone; colour -- the absence of trace elements or malformations that either restrict (yellow) or enhance (red) the stone; carat weight -- the weight of the stone and cut -- the shape and excellence of the gemstone when the diamond cutter's job is finished.
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Is the diamond valuable?
Yes, if it is a gem-stone quality diamond.
What are the properties of a gem stone?
it should be in a crystalin structere
What gem stone represents 75th anniversary?
Gold
What is Arkansas's gem stone?
It's state gem is the diamond and its state mineral is the quartz crystal.
What is a Marquis Diamond?
Marquis is the name of a shaped cut of a gem-stone quality diamond.
What gem stone is kimberly in south Africa?
yellow diamond
What is an inferior diamond called?
An inferior gem-stone diamond is still called a diamond, and based on its cut, colour, carat weight and clarity, may not be of the highest quality. Non gem-stone diamonds are called industrial diamonds.
What is the hardest gem stone?
The hardest gemstone is the diamond.
Can you see through a rough diamond?
Your answer depends on the individual diamond. Gem-stone quality raw diamonds are much more clear than industrial-quality diamonds. You can see a photo of a raw, gem-stone quality diamond, and learn more about them, below.
How do you tell if you have real diamond?
Take your stone to a local jeweler who can use a probe to determine whether or not your gem is a diamond.
What is quality cultured diamond?
A cultured diamond is made in a laboratory and is not a natural stone, even though it is manufactured from carbon. Industrial diamonds have been made in laboratories in America since the 1950s, and gem-stone quality diamonds only recently. What can be inferred from the phrase in your question is a description of a gem-stone quality diamond (which is always less valuable than a natural diamond).
What rock is a red and yellow gemstone with a hardness of 7.5?
Only Diamond is as hard as diamond, and if their could be any gem stone as hard as diamond then it would definitely be Diamond.
