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Golconda Diamonds - The Type IIa Diamond

What is a Golconda Diamond?

Two Definitions

A Golconda diamond has two definitions. One is a diamond mined in a region around Golgonda (Golkonda) in the middle part of India near the modern city of Hyderbad. Known for its very fine diamonds such as the Hope Diamond, many other famous diamonds have been mined in this area, most in the 18th and 19th centuries.

The second definition is applied to type IIa diamonds. There are four types of diamonds, Type Ia, Type Ib, Type IIa and Type IIb. Each has a specific chemical combination within that type.

Type Ia diamonds, containing up to .3% nitrogen make up the majority of the gemstones in the marketplace today. Type Ib diamonds are often referred to as canary or yellow diamonds as their chemical makeup containing nitrogen frequently renders them yellow or brownish in color. Synthetic diamonds are also type Ib diamonds. Type IIb diamonds contain boron. These are very rare (about 1% of all diamonds) and may result in diamonds of a blue or blue grey color.

Type IIa Diamonds

Type IIa diamonds are exceptionally rare and contain very little nitrogen. So little in fact that they are frequently described as "clear as glass". Golconda or super diamonds as well as others in this category are unrivaled in the diamond world. Reputed to be the finest of diamonds, their extraordinary luminescence and transparency defy description. The Koh-i-Nor and the Culinan are two of these super diamonds.

Sell Your Goldconda Diamond - We Purchase Golconda Diamonds

If you wish to sell your Golconda diamond (Type IIa), or if you wish to find this superior type diamond to purchase, please contact us at any time.