Colour Authentication

Fancy Coloured Diamonds

The origin of colour in fancy coloured diamonds is of paramount importance to its value. A diamond will either be of natural colour origin as created by nature, or else it has been treated and enhanced by man.

DCLA authenticates all fancy coloured diamonds as natural prior to certification or diamond reports.

DCLA is currently the only internationally recognised laboratory not to issue Diamond Grading Reports for colour treated diamonds.

A preliminary colour authentication service is available upon request.

Colourless Diamonds

DTC DiamondView Machine
DTC DiamondView

Certain “white” diamonds may be enhanced to improve their colour as well. All diamonds that come into the DCLA laboratory are screened for enhancements, and referred for further testing if they do not pass the initial screening. DCLA will only issue a Diamond Grading Certificate or Diamond Reports for diamonds of natural colour origin.

Synthetic Diamond Identification

DCLA Advance diamond testing
DTC DiamondView

All diamonds that come into the DCLA laboratory are screened to ensure that they are natural and not man-made.

Diamonds that do not pass the initial screening are referred for further testing.

DCLA is currently the only internationally recognised laboratory not to issue Diamond Grading Reports for synthetic diamonds.

A preliminary synthetic diamond identification service is available upon request.

When Selling A Diamond ?

DCLA will help you check and value you items for sale or auction.

Knowing the value of your diamond jewellery, Information is critical to get you the correct value:

Considering selling your diamond, but feel as though you have no idea how or where to begin ?

These simple tips will help you along the way.

TIP #1 Diamonds are usually given to display love, making the sentimental value higher to the seller than the actual value to a buyer. Should you be in the market to sell your diamond, make sure you are ready to part with the diamond before beginning the process.

TIP #2 Be sure of the quality and authenticity of what you are trying to sell. Make sure of the quality and the grade of the stone. This is most important for the ultimate value of the diamond. There have been many instances where a seller is committed to selling their diamond only to find out the quality isn’t as described when originally purchased.

There are Jewellers or services available, who will give an unbiased assessment of your stone. But it is far more valuable in the long run to get a report from a recognised Laboratory.

It is also recommended to verify the report matches the Laser inscription before placing your diamond on the market, to assure your diamond is the same stone should it not sell.

TIP #3 Now that you have an accurate report of the quality, make sure you get a realistic selling value. Believing the diamond holds a higher value than it truly possesses will lead to a challenging, frustrating experience which can be dragged out.

An appraiser can assist you with determining a fair selling, price so you can avoid this pitfall. Diamonds are priced in US dollars, so your diamonds price will be affected when converted to your local currency.

A easy way to see current retail values is to visit online stores like or

TIP #4 There are many ways to sell a preloved diamond or diamond jewellery. Research your selling options to make an educated decision that works best for you. Be it an online market or exploring options through a local jeweller or dealer, be sure you are using the best option for your needs.

Example, if time is not of the essence, an online market or an auction house could be the best way forward. If you want a quick sale, visiting your local dealer may be the best option.

DCLA Diamond Laboratory provides an internationally recognised and respected report to any seller or prospective buyer.

DCLA will provide you with an experience expert to advise you and give you the accurate value protecting you when selling. Our goal is to provide you with as much knowledge as possible.

Call us for information, advice or to make an appointment for a personal Visit .

Or call us on 1300 413 425 or Sydney 02 92612104