SIGMA, an independent international gemological labortory was established in Singapore in 2004.

With well equipped labortory and manage by professional and experienced Graduate Gemologists.

We deliver high quality and consistent reports/appraisals that fully conform to the highest standard base on international recognised system.

Our core values are:

· Professional
· Confidential
· Competitive Price
· Service Integrity

SIGMA also created the possibility by providing solution to the jewellery industry to certify their diamonds/gemstones with a minimum cost without compromising in quality.

SIGMA - Your Hallmark of Integrity