JewelStruck Blog

GEMS April – Types of Diamond

by JewelStruck on Apr.21, 2010, under GEMS

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Continuing with Gemstone Each Month Series (GEMS) for April month, we would be posting about types of Diamonds. Also showcasing a very beautiful Diamond ring by rcnevada. If you have anything to share on Diamonds, do email us as info@jewelstruck.com.

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Diamond ring by rcnevada

Coming back to types, Natural Diamonds can be categorized into 4 types, depending on the impurity levels.

  • 1a – It is the most common form of Diamonds and contains about 0.3% of Nitrogen. It absorbs blue light and so are generally light yellow or brown in color.
  • 1b – They are very rare in nature, about 0.1% of total. In them the nitrogen atoms occur isolated throughout the carbon lattice. In general have a more intense color than Type Ia diamonds, absorbing green as well as blue light. They can appear yellow, orange, green or brown in color.
  • 2a – They contain very negligible amount of impurities and are considered purest form of Diamonds. These are generaly colorless.
  • 2b – They occour very rare and may contain even lower concentrations of nitrogen than 2a. But they contain boron impurities at the atomic level, because of which they are generaly bluish in color. They constitute about 0.1 percent of total

Other than natural Diamonds, diamonds can be synthesized too. Two of the methods used are High Pressure High Temperature Synthesis using graphite and another growth technique called Chemical Vapour Deposition(CVD).

So thats all we had on types of Diamonds, we will be back with next post in this series soon.

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