Diamond 4Cs of grading | Diamond Quality | GemTrove


Our Comprehensive Diamond Buying Guide - Diamond 4C's


Get the best value out of your diamond jewellery. Understanding diamonds is a crucial step in buying fine jewellery. At GemTrove our gemologists are passionate about diamond education. Learn from our helpful team about the 4 C’s of diamond grading.

The 4 C’s Of Diamond Grading

GIA certification is how we determine the quality of our loose diamonds. Each loose diamond is certified by the Gemological Institute of America. The GIA process outlines that four elements make up the overall of a diamond. The 4 C’s stand for colour, clarity, cut grade and carat weight. We determine the true value and pricing of all our diamonds through the GIA method.


On the surface, it can be hard to notice the variance of colour in a diamond. Most mined diamonds possess a faint, yellow hue. The GIA colour grade assesses a diamond by the shade of this yellow tone. The less yellow colour a diamond has the value it is. A diamond’s colour is determined by a range of D (colourless) to Z (light yellow).

Learn more about diamond colours and the D to Z scale here.


Diamonds are known for its glimmering appearance. However, a human eye isn’t able to properly assess the true clarity of a diamond. To test the clarity grading of a diamond, it must be magnified closely. The thorough GIA clarity testing looks into any blemishes or inclusions in a diamond.

Read our in-depth guide on diamond clarity here.

Cut Grade

Diamonds are available in a variety of cuts. A cut grade assessment goes beyond the general shape of a diamond. For a loose diamond to be tested for quality cut grading each shape is valued. From solitaire to halo, a diamond’s cut helps support its true value.

Check the value of your diamond cut by reviewing our cut grade report here.

Carat Weight

The size of diamond can often be mistaken for value. However, it’s the density that determines the price and quality of a loose diamond. A diamond’s cost value rises as its weight increases. A GIA report can assess the true carat weight of a diamond, ranging from 0.25 to 5.0 carats.

Browse our carat weight chart to learn more about the cost value of your jewellery here.

Review The Quality Of Your Diamond Today
All our luxury diamond jewellery are evaluated for its colour, clarity, cut grade and carat weight. Have your diamond’s valued by our expert gemologists. At GemTrove our friendly staff can guide you through the essentials of purchasing quality diamonds.

Visit our showroom today to speak to one of our diamond values. The GemTrove flagship store located on Swanston St, Melbourne.

We are happy to help with any inquiries about the evaluation process and diamond buying. Reach out to a GemTrove team member now by calling us on (03) 9663 9001. Or send an email to diamonds@gemtrove.com.au.

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