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: Country of Gem Origin
Frequently Asked Questions (FAQ) / Country of Origin

Can you certify country of origin for your gemstones?

We currently offer brief identification reports from AIGS and BGL labs that can identify / determine if a material is natural, and in most cases, treatment. These types of identication reports do not certify country of origin. However, there is growing interest in certifying gemstone origin and Full Reports available through AIGS and BGL are able to offer origin statements for an additional cost. Please be aware that the results are not always conclusive, and most labs offer their identification as a professional opinion of 'probable origin' only. For more information on this issue please see our article on country of origin, or if you would like to pay extra for a Full Report through AIGS or BGL labs, please contact our customer service during your order process so that we can arrange this gemstone certification service for you.

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  • First Published: February-20-2006
  • Last Updated: July-03-2017
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    Reproduction (text or graphics) without the express written consent of (SETT Company Ltd.) is strictly prohibited.
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart