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Certified Diamonds Explained

Certified Diamonds Explained


Our Certified Diamonds have been expertly graded by a gem laboratory based on cut, colour, clarity, and carat weight. Purchasing your very own Certified Diamond assures you of absolute stone quality and responsible sourcing for total peace of mind.

Expertly graded

Mazzucchelli’s uses several trusted laboratories to certify our diamonds. A diamond certificate produced from an independent laboratory provides an additional level of assurance on the grading assessment of your diamond.

How to access your certificate

Each Mazzucchelli’s Certified Diamond is inscribed with a unique serial number that matches a diamond certificate. You can access your own digital diamond certificate/grading report quickly and conveniently by following the steps outlined below:

  • Check your Mazzucchelli’s purchase receipt (or serial number detail email for online customers) and locate the serial number and laboratory details
  • Select the name of the grading laboratory from the list below
  • On the laboratory site you can enter your serial number to view your full digital certificate/grading report details
  • If your serial number ends with -X or -S please do not include this in your search


Gemological Institute of America


International Gemological Institute


Gemological Science International


Rand Provenance


Diamond Certification Laboratory of Australia


Australian Diamond Grading Laboratory


HRD Antwerp


American Gem Society


Maple Leaf Diamonds

If you have purchased a Forevermark Diamond, you also have the option of registering your diamond here.

For any enquires or further information please contact your local Mazzucchelli’s retail store or contact us directly via this website.

Size Guide

You’ve found the perfect ring but have no idea what size you need. By following our tips and using our printable Ring Size Guide, finding out your ring size is easier than you think.

Tips for Finding Your Correct Ring Size
The ideal ring fit is loose enough to slide over your knuckle and tight enough so that it cannot fall off your finger.

Many people find that a variance of a half size or less will still fit comfortably most of the time.

Measuring your Finger
We have provided an easy way to measure your correct ring size with our Ring Size Guide

Download our Ring Size Guide here