Ever been caught in the shimmering allure of a diamond? Gazing at a diamond's glimmer can be like looking into an endless sea of stars - but it's more than just its shine. Take emerald cut vs radiant cut, for example.

Imagine being at a crossroads, one path leads you to an emerald-cut diamond - elegant and sophisticated with its step-like facets that mirror stairways leading to infinite depths. The other way introduces you to the radiant-cut gem - bold and vivacious as it dances with dramatic flashes across every facet.

Choosing the perfect diamond size can feel overwhelming, especially with so many factors to consider—but it doesn’t have to be. This guide will walk you through what truly matters when selecting the diamond that will mark one of the most meaningful moments of your life.

Factors to Consider When Choosing the Perfect Diamond Size

Selecting a diamond is a deeply personal experience. It’s not just about choosing something beautiful, it’s about choosing something right for you or your partner. Here’s what to keep in mind:

1. Average Diamond Sizes in Australia

To start, let’s break down carat weight. One carat equals 200 milligrams, but visually, a two-carat diamond does not look twice as large as a one-carat. This is because size perception is influenced by proportion, cut, and surface area, not only weight.

In Australia, the average engagement ring features a diamond between .90ct and 1.5ct fo a natural diamond and between 1.8 and 3.00 carats for a lab grown diamond. But at Morgan & Co, we don’t believe in rules or trends dictating your choice. Your ring should reflect your taste, lifestyle, and values.

For personalised guidance, we always recommend booking a complimentary consultation at our Buderim studio.

2. How Finger Size Influences Perception

Your partner’s hand and finger shape can make a diamond appear larger or smaller:

• Petite fingers may suit a slightly smaller stone

• Fuller fingers may balance a larger diamond beautifully

• Slender fingers often look elongated with oval or marquise cuts

• Round cuts may appear more proportional on broader fingers

Trying on different styles is the best way to get a sense of what feels right. Solitaire designs remain popular because they flatter every hand shape and allow the centre stone to shine.

3. Lifestyle Considerations

An engagement ring is worn every day, so lifestyle matters:

• Active jobs or hands-on hobbies may suit smaller or lower-profile stones

• Office-based lifestyles allow for larger, more elevated designs

• Those who love jewellery may naturally gravitate toward larger diamonds

Practicality is just as important as aesthetics when choosing a ring you’ll wear forever.

4. Budget Matters (But Bigger Isn’t Always Better)

Budget is a key factor, but it shouldn’t be stressful. If you're opting for a natural diamond, a smaller, high-quality diamond will always look more beautiful than a larger, poorly cut stone.

Currently, natural diamonds between .90ct and 1.20ct are increasingly popular for their minimal, elegant appeal and excellent value. There are stunning options starting from $14,000 for a natural diamond of reasonable quality. 

As for lab grown diamonds, you're more free to increase your diamond size and quality because their starting prices are much lower than a natural diamond.

At Morgan & Co, we work closely within your budget to create a ring that feels luxurious, personalised and meaningful, without compromising on quality.

How Diamond Cuts and Shapes Affect Perceived Size

Carat weight is only one part of the equation.
Cut and shape can dramatically influence how large a diamond looks.

1. Brilliant (Round) Cut

The most classic and sparkly, thanks to its 58 facets. Because so much weight goes into creating brilliance and symmetry, round diamonds can appear slightly smaller than other shapes of the same carat weight.

2. Oval & Marquise Cuts

Their elongated silhouettes make them appear larger than round diamonds of the same weight, while also flattering the finger by adding length.

3. Princess & Cushion Cuts

Square or softly square, these cuts offer excellent surface area and often look bigger when viewed from above.

4. Pear Cut

Romantic and unique, its teardrop shape gives a stunning elongated look, enhancing the perception of size even in smaller carat weights.

We offer all of these shapes and more at Morgan & Co—whether you visit us in our Sunshine Coast studio or book a virtual consultation.

Why Diamond Quality Matters More Than Size

A diamond’s beauty is influenced by the 4Cs: Cut, Colour, Clarity, and Carat Weight.

Cut determines brilliance.
Colour affects purity and value.
Clarity influences sparkle and transparency.

A high-quality diamond will look more radiant—and sometimes even larger—than a bigger diamond of lower clarity or poorer cut.

How Settings Influence the Appearance of Size

The setting you choose can dramatically change how large or small your diamond appears:

1. Solitaire Setting

Minimal and timeless.
Allows the diamond to take full visual focus, often making smaller stones appear larger.

2. Halo Setting

Adds a ring of tiny diamonds around the centre stone, increasing sparkle and creating the effect of a larger diamond.

3. Bezel Setting

A metal rim surrounds the stone for maximum protection.
This can make the diamond appear slightly smaller because less light enters the stone.

4. Prong Setting

Elevates the diamond to capture light from every angle.
Makes even modest-sized diamonds appear brilliant and more substantial.

5. Pavé Setting

Small diamonds set along the band amplify sparkle and boost the overall luxurious feel.

6. Channel Setting

Creates a seamless row of diamonds along the band, balancing elegance with practicality.

We guide you through all these setting styles during your appointment so you can confidently choose the perfect ring.

Conclusion

Choosing the right diamond size involves more than following trends or aiming for a certain carat weight. Consider your partner’s finger shape, lifestyle, personal style, and—most importantly—what will feel meaningful and special for the two of you.

Whether you choose a handcrafted solitaire or a custom Morgan & Co design, we’re here to support you every step of the way. Each piece is crafted with love on the Sunshine Coast using ethically sourced diamonds and high-quality precious metals.

Your dream engagement ring is waiting and we’d be honoured to help you create it. Book your complementary consultation with our team at our Sunshine Coast studio. 

With Love,
Morgan xo