World Recognised

Gemmological Association

Diamond Diploma

Opening hours

Mon - Sat 9.30am - 5pm

Evenings by appointment

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Engagement & Wedding Ring Insurance

Get worldwide cover for your engagement ring if lost, damaged or stolen. Straightforward insurance with few exclusions and no excess

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World Recognised Gemmological Association Diamond Diploma

An engagement diamond may be the biggest purchase you've ever made. At McMaster Jewellers, we will help you spend your budget on the diamond qualities that are most important to you. Read on and we'll provide you with a understanding of diamond quality.

Diamond Shape

To start, find out what shape she likes. Popular diamond shapes include round, oval, princess-cut, emerald-cut, pear-shaped, and heart-shaped diamonds. The majority of diamond engagement rings today are set with a round diamond and princess-cut diamonds.

Diamond Size

See the chart to get an idea of the size of diamond. You'll find a wide range of diamond sizes available within a given budget.

Diamond colour grading scale 

The scale begins with the letter D, representing colourless, and continues, with increasing presence of colour, to the letter Z.

Diamond Clarity
Because they are created deep within the earth, most diamonds contain unique birthmarks called inclusions and blemishes. 

The GIA Clarity Scale contains 11 grades, with most readily available diamonds falling into the VS or SI categories. In determining a clarity grade,

Heart Diamond ring
Diamond size
Diamond Colour
Diamond Clarity