DCLA is Australia’s premier diamond grading laboratory

The DCLA Difference

The Diamond Certification Laboratory of Australia (DCLA) is one of the world’s foremost independent diamond grading and certification laboratories.

DCLA uses state-of-the-art technology and equipment to grade diamonds based on the Four Cs: Carat weight, Cut, Clarity, and Colour. The laboratory also offers advanced services such as diamond fluorescence grading, diamond verification, and light performance analysis.

DCLA is known for its strict grading standards and consistent grading practices. Its diamond grading reports are recognized and accepted worldwide, providing customers with confidence in their diamond purchases.

DCLA is Australia’s premier diamond grading laboratory, and remains the only internationally recognised diamond certification laboratory in Australia, grading diamonds in accordance with International Diamond Council (IDC) and World Jewellery Confederation (CIBJO) rules for grading polished diamonds.

DCLA Protecting Diamond Buyers



The principle mission of the DCLA is to protect diamond consumers, and consumer confidence, when buying diamonds, providing accuracy, consistency and transparency in diamond grading.

The Diamond Certification laboratory of Australia is equipped with the most advanced diamond technology and equipment in Australia.

All diamonds submitted to the DCLA laboratory are individually identified and tested to International Diamond Council standards, ensuring that the diamond has not been treated or enhanced in any way, and are of natural origin.

The DCLA Certificate identifies the diamond is a natural diamond or a man-made synthetic diamond before it is sold by the trade to consumers.

In addition to diamond grading services, DCLA also offers education and training programs to help consumers and industry professionals understand the nuances of diamond grading and the diamond market.

Independent, Consistent & Accurate Diamond Assessment

DCLA Independence
DCLA Independence means that the DCLA Diamond Grading and Certification Laboratory receives no grants or funding from the diamond or jewellery trade, it is completely self funded and independent.

Trusted and Respected

DCLA is the most respected and trusted name


Most importantly DCLA protects you the diamond jewellery or investment diamond consumer.

Before you buy loose unset diamonds, consult the laboratory for independently certified diamond advice.

If you are in the process of selling diamonds, be sure to contact DCLA for their advice on how to sell a diamond.

DCLA & The International Diamond Council (IDC)



The International Diamond Council (IDC) is an industry body that was created in 1975 to promote and regulate the diamond trade. It is a joint venture between the World Federation of Diamond Bourses (WFDB) and the International Diamond Manufacturers Association (IDMA). The IDC’s mission is to maintain the integrity and reputation of the diamond trade by setting ethical and technical standards, promoting transparency, and facilitating communication and cooperation between all stakeholders in the diamond industry.

One of the IDC’s most significant achievements is the creation of the International Diamond Grading System (IDGS) in 1978. The IDGS provides a standardized and objective way to evaluate the quality of diamonds based on the “Four Cs” – carat weight, clarity, color, and cut. The IDGS has since become the industry standard for diamond grading.

The IDC also plays a crucial role in preventing the trade of conflict diamonds or “blood diamonds,” which are diamonds that are illegally mined and sold to finance armed conflict and human rights abuses. The IDC works with governments, non-governmental organizations (NGOs), and other industry bodies to ensure that diamonds are sourced responsibly and ethically.

Overall, the IDC’s work is essential in maintaining consumer confidence in the diamond industry and ensuring that diamonds continue to be a symbol of love, beauty, and enduring value.

The International Diamond Council (IDC) is the governing diamond body established by the World Federation of Diamond Bourses (WFDB) and the International Diamond Manufacturers Association (IDMA). Together, these two organisations are the world’s highest authorities in diamonds.

DCLA is the only International Diamond Council (IDC) laboratory and the only CIBJO Diamond Grading laboratory for Australia, and holds the only official registered National Diamond Masterset for Australia, the diamond C2Au set.