Jewellery Buying Guides
Expert knowledge to help you make confident choices when selecting diamonds, metals, and the perfect fit.
Understanding Diamond Quality
The quality and value of a diamond is determined by four key characteristics known as the 4Cs: Cut, Colour, Clarity, and Carat. Understanding these factors will help you choose the perfect diamond.
At My Jewellery Shop, all our diamonds are independently certified by GIA, GCAL, or IGI, giving you complete confidence in your purchase.
The 4Cs Explained
Understanding the 4Cs is the key to choosing the perfect diamond.
Cut
How well a diamond is cut determines its brilliance and sparkle. A well-cut diamond reflects light beautifully.
| Excellent | BEST |
| Very Good | |
| Good |
Colour
Diamond colour is graded from D (colourless) to Z (light yellow). Less colour means more value.
| D - F | Colourless |
| G - H | BEST VALUE |
| I - J | Near Colourless |
Clarity
Clarity measures the presence of inclusions and blemishes. Most are invisible to the naked eye.
| FL / IF | Flawless |
| VVS1 - VVS2 | Very Very Slightly Included |
| VS1 - VS2 | SWEET SPOT |
| SI1 - SI2 | Slightly Included |
Carat
Carat refers to a diamond's weight, not its size. Larger carat weights are rarer and more valuable.
| 0.25 ct | 4.1mm |
| 0.50 ct | 5.1mm |
| 0.75 ct | 5.9mm |
| 1.00 ct | POPULAR 6.5mm |
| 1.50 ct | 7.4mm |
| 2.00 ct | 8.2mm |
Diamond Shapes
Each diamond shape has its own unique character and brilliance. Explore the most popular cuts below.
Round Brilliant
The most popular diamond shape, renowned for maximum brilliance and fire. Accounts for over 50% of all diamonds sold.
Princess
A modern square cut with exceptional brilliance. The second most popular choice for engagement rings.
Oval
An elongated shape that creates the illusion of greater size. Flattering on the finger with beautiful brilliance.
Emerald
An elegant step-cut with a hall-of-mirrors effect. Prized for its sophisticated, vintage appeal.
Pear
A unique teardrop shape combining the best of round and marquise cuts. Elegant and distinctive.
Marquise
An elongated shape with pointed ends that maximises carat weight. Creates a dramatic, eye-catching look.
Cushion
A soft square shape with rounded corners, combining vintage charm with modern brilliance.
Asscher
A square step-cut with cropped corners and a mesmerising concentric pattern. Art Deco elegance.
Radiant
A rectangular shape with trimmed corners that combines the elegance of emerald with the sparkle of round.
Heart
The ultimate symbol of love. A modified brilliant cut that requires exceptional craftsmanship.
Ready to Find Your Diamond?
Browse our collection of GIA, GCAL & IGI certified diamonds.
Shop DiamondsUnderstanding Jewellery Metals
Each metal has unique properties that affect durability, appearance, and price. Consider your lifestyle, skin sensitivity, and personal style when choosing a metal.
At My Jewellery Shop, we work with the finest precious metals to create pieces that last a lifetime. Our team can help you choose the perfect metal for your piece.
Choosing the Right Metal
Consider these key factors when selecting a metal for your jewellery.
Skin Sensitivity
Platinum and palladium are naturally hypoallergenic, making them ideal for sensitive skin. 18K gold is generally well-tolerated, while lower karat golds may cause reactions in some people.
Lifestyle
If you work with your hands or lead an active lifestyle, consider platinum for its superior scratch resistance. White gold and yellow gold are excellent all-rounders for everyday wear.
Gemstone Pairing
White metals (platinum, white gold) enhance the brilliance of diamonds and colourless stones. Yellow and rose gold create beautiful contrast with coloured gemstones and warmer-toned diamonds.
Budget
Sterling silver offers the most affordable entry point. 9K gold provides excellent durability at great value. 18K gold is the luxury standard. Platinum commands a premium for its rarity and purity.
Need Help Choosing a Metal?
Our jewellery consultants can guide you through the options and help you find the perfect metal for your piece.
Speak to an ExpertFind Your Ring Size
Getting the right ring size is crucial for comfort and security. A well-fitted ring should slide on easily but require a slight tug to remove over the knuckle.
We recommend visiting our Gold Coast showroom for a complimentary professional fitting. If that is not possible, use our at-home guide below to find your size.
Australian Ring Size Chart
Australia uses an alphabetical ring sizing system. Find your size below with corresponding measurements.
| AU Size | US Size | Diameter (mm) | Circumference (mm) |
|---|---|---|---|
| H | 4 | 14.9 | 46.8 |
| I | 4.5 | 15.3 | 48.0 |
| J | 5 | 15.5 | 48.7 |
| K | 5.5 | 15.9 | 50.0 |
| L | 6 | 16.2 | 50.9 |
| M | 6.5 | 16.5 | 51.8 |
| N | 7 | 16.9 | 53.1 |
| O | 7.5 | 17.2 | 54.0 |
| P | 8 | 17.5 | 55.0 |
| Q | 8.5 | 17.9 | 56.2 |
| R | 9 | 18.2 | 57.2 |
| S | 9.5 | 18.5 | 58.1 |
| T | 10 | 18.9 | 59.3 |
| U | 10.5 | 19.2 | 60.3 |
| V | 11 | 19.5 | 61.3 |
Highlighted sizes (L, N, R) are the most commonly purchased women's sizes in Australia.
How to Measure Your Ring Size
If you cannot visit our showroom, follow these simple methods at home.
Existing Ring Method
Place a ring that fits well on a ruler. Measure the inside diameter in millimetres and match it to the chart above.
String or Paper Method
Wrap a thin strip of paper or string snugly around the base of your finger. Mark where it overlaps, then measure the length in millimetres.
Visit Our Showroom
For the most accurate sizing, visit our Gold Coast showroom for a complimentary professional fitting with our certified team.
Tips for Accurate Sizing
Not Sure About Your Size?
Visit our Gold Coast showroom for a complimentary professional ring sizing. We will make sure you get the perfect fit.
Book an Appointment
