CAMPBELL COYLE GEMS LTD
MAYFAIR
LONDON

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Diamond Investment Guide

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4 C’s of Diamond Grading

Diamond Cut

Diamond Colour Grading System

Diamond Clarity

Diamond Carat Weight

Loose Diamonds

Pink Diamonds

Blue Diamonds

Yellow Diamonds

Red Diamonds

Rough Diamonds

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DIAMOND CERTIFICATION

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4 C’S OF DIAMOND GRADING

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4 C’S OF DIAMOND GRADING

Before making any investment on a diamond, the 4 C’s of diamond grading should be understood so that you can understand what you will be getting for your money. The 4 C’s of diamond grading consist of – cut, colour, clarity and carat weight. All of these essential specifications will assist any novice in the buying and selling of a diamond.

Loose diamonds are diamonds that have not been set into a piece of jewellery. There are advantages to having loose diamonds. They can be set as any piece of jewellery the person wants and in the kind of metal with the kind of design he/she wants or kept as is and sold at a later stage.

LOOSE DIAMONDS

ROUGH DIAMONDS

Campbell Coyle Gems is a licensed buyer and seller of rough and polished diamonds and as a KPC Member we are committed to the trading of legal diamonds, adhering to a zero tolerance policy against conflict diamonds whilst operating with 100% transparency. Whether a client is in the market for rough or polished diamonds, we are guaranteed to assist with top quality diamonds.

DIAMOND CERTIFICATION

Before being graded, most diamonds are sent to a diamond grading laboratory for a comprehensive evaluation. This process is known as certification. A reputable grading laboratory is staffed by experienced gemmologists who specialise in diamond grading.

TENDER PLATFORMS

Campbell Coyle Gems specializes in the buying of rough diamonds which are sold as rough diamonds, buying of rough diamonds which are polished and sold as polished diamonds as well as buying rough colour diamonds which are then polished and sold as polished colour diamonds. Our target markets include selling to jewellery shops who use these rough or polished stones in the making of their own jewellery pieces, selling at tenders as well as individuals.

DIAMOND MINING

Campbell Coyle Gems looks forward to the future of progressive diamond mining in Sierra Leone where we will be able to source “from pit to polish” diamonds for the investment market. Read more about diamond deposits, the Kimberley Process as well as diamonds of Sierra Leone by clicking on the explore button below.

LOOSE DIAMONDS

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ROUGH DIAMONDS

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TENDER PLATFORMS

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DIAMOND MINING

DIAMOND TOUR

The DIVA Museum, an institution created with the idea of highlighting the story behind some of the world’s most beautiful diamonds. Antwerp is known for being home to silversmiths, jewellers and diamond dealers since the sixteenth century, and this new 850 m²- museum tries to showcase how, throughout time, different techniques have been used in the area to work precious metals and gemstones.

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DIAMOND TOUR