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Diamond Grading

17.1 Colour grading

Colour in the diamond trade usually refers to the amount of yellow in a stone, but can also indicate brown or gray and sometimes all three.

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Diamond Carat

Carat - The easiest of the five c's to understand. The "carat" is a measure of weight. The larger the diamond is the larger the carat weight figure will be.

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Cubic Zirconia and other diamond simulants

The history of cubic zirconia...

Cubic zirconia (CZ) was found in 1892; however, CZ was rare and hard to find, so for a long time, it wasn’t sought after and was considered to have little economic importance.

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Diamond Cuts

Cut Related Terms

Porportion - The best cut diamonds reflect light back to the eye evenly in the face-up position. Here no dark areas are visible.

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Diamond in Manufacture

16.8 Diamond in Manufacture
16.8.1 Methods of manufacture

Cleaving
When a rough diamond is determined to be suitable, it is carefully studied for every detail of its structure. It will then be marked and given a sharp blow with a special hammer to separate the stone into two carefully planned parts.

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Who are we?

The Geohavens name is an assurance of timeless beauty, distinct quality and uncompromising value. The Company spares no effort in sourcing from the farthest markets and the deepest mines in order to unearth the most attractive gems.

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