How to Choose the Perfect Engagement Ring
Written by Chris Ozkoch · Reviewed by Harry Ozkoch and Lisa D FGAA · Updated 2026-06-04
Choosing an engagement ring is the only major jewellery purchase most people make without ever having shopped for jewellery before. The vocabulary is unfamiliar, the prices feel opaque, and the advice on the internet contradicts itself page to page. That is normal. This guide walks through the seven decisions that actually matter — budget framing, the 4Cs, shape, metal, setting style, lab-grown vs natural, and timeline — in the order we work through them with first-time buyers at our Frankston workshop. Email us before visiting Collins Street for engagement-ring and wedding-ring consultations. Please wait for our email confirmation before coming in.
Setting a budget without quoting a number
Forget the old three-months-salary line — it was an advertising slogan, not financial advice. A sensible budget is whatever leaves you comfortable the month after the ring is paid for. Couples who set that number in advance, before falling for a specific stone, end up happier with the result.
Two practical framing questions: would you rather a larger stone with a simpler band, or a smaller stone with more detail in the setting? And: do you want the ring to be finished and worn in weeks, or are you happy to wait while a stone is sourced specifically for you? Your answers point us at very different starting designs.
We never push a customer toward a bigger spend than they have signalled. If something does not fit the brief, we say so and adjust the design — narrower band, smaller centre, different shape — until the numbers and the look both work.
The 4Cs — cut first, then colour, clarity, carat
The 4Cs (cut, colour, clarity, carat) are the four grading dimensions GIA uses to describe a diamond. They are not equally important. Cut is the one that decides whether the stone looks alive in candlelight or dead under shop fluorescents. Spend on cut first.
G–H colour and VS2 clarity can be useful starting points for a shortlist. Inclusion visibility and apparent colour vary with the stone, setting, lighting and viewer. Step cuts can make internal features easier to see, while brilliant faceting can mask some features. Compare actual stones: higher grades may or may not offer a visible difference that matters to you.
Carat is mass, not size. Two diamonds of the same carat weight can look noticeably different from above depending on shape and cut depth. We always show the measurement in millimetres alongside the carat figure so the face-up size is honest. The 4Cs hub explains each dimension in detail with photographs.
Choosing a shape
Shape is the single most visible decision. A round brilliant reads as classic and sparkles the hardest; an oval looks elongated and slimming on the finger; an emerald or asscher reads as architectural and Art Deco; a pear or marquise reads as feminine and a little vintage. None is better — they suit different hands and different temperaments.
The most common regret we hear is not about the shape itself but about not having seen it in person before committing. We keep examples of every common shape at the Frankston workshop precisely so you can hold them next to each other. Photos lie about scale; a stone in your hand does not.
If you are weighing two shapes against each other, the shape comparison page lines them up side by side. Each shape also has its own dedicated buying guide with the clarity and colour floors that matter for that cut.
Choosing a metal — yellow, white, rose, or platinum
Four common options: 18kt yellow gold, 18kt white gold, 18kt rose gold, and platinum. The first three are alloys of pure gold with different metals mixed in; platinum is a denser, naturally white metal that costs more per gram and wears differently.
Yellow gold is warm, traditional, and the kindest to lower-colour diamonds (it disguises any warmth in the stone). White gold reads as modern and lets a colourless diamond show its colourlessness; it needs re-rhodium-plating roughly every twelve to twenty-four months to stay bright white. Rose gold is the warmest of the three and ages gracefully — its colour is from copper in the alloy, so it deepens slightly over decades.
Platinum is the most expensive option per gram, sits heavier on the hand, and develops a matte patina rather than scratches showing through. We have a longer comparison at the platinum vs 18kt white gold page if you want the full metallurgy.
Choosing a setting style
The setting is the metalwork that holds the stone. Five styles cover most decisions: solitaire, halo, hidden halo, three-stone, and cluster.
A solitaire is one stone, claws or bezel, nothing else — the cleanest expression of the diamond and the easiest to pair with a wedding band later. A halo wraps small diamonds around the centre stone to make it read larger and sparkle harder; a hidden halo tucks those small diamonds under the centre so they are only visible from the side. A three-stone setting flanks the centre with two smaller stones and reads as more deliberate and a touch vintage. A cluster groups several smaller stones to read as one larger shape, and is the most cost-efficient way to get visual presence on the finger.
Setting style and shape interact. A halo flatters a round or oval; a bezel or double-claw flatters an asscher or emerald; a three-stone setting with tapered baguettes is the classic Art Deco answer. We sketch two or three options at the first consultation so you can see the same stone in different settings before committing.
Lab-grown vs natural — what is actually different
Chemically and optically, a lab-grown diamond is a diamond — identical carbon lattice, identical hardness (10 on the Mohs scale), identical refractive index. A trained gemmologist cannot tell the difference by eye; verification requires specialised equipment.
The real difference is price and provenance. Lab-grown stones land at a meaningful discount to natural stones of the same spec, which means the same budget buys a noticeably larger or higher-spec lab-grown stone. Natural stones carry the geological provenance — billions of years in the earth — which matters to some buyers and not at all to others.
There is no right answer. Many of our customers choose lab-grown for the centre stone and natural for the side stones, or the other way round. The lab-grown diamonds page explains the grading, the sourcing, and how to check the actual GIA or IGI grading report available for an individual stone.
Custom-made vs collection designs
Anny's makes every engagement ring on-site at the Frankston workshop, but there are two pathways. Custom-made starts from a blank brief — your shape, your stone, your setting. Collection designs use existing Anny's patterns where we hold examples in display sizes, then resize and set the centre stone of your choice. Both follow our standard window: 3–4 weeks from CAD sign-off to delivery.
Custom is the right answer if you have a specific design in mind, a family stone to reset, or a vintage reference photo. A collection design is the right answer if you want to see an established Anny's design before you commit or prefer to skip the design back-and-forth.
We walk through the full custom process — brief, CAD, 3D print, casting, setting, polish — on the journey of a custom ring page. Either pathway, the same bench team makes the ring.
Finding your partner's ring size without giving the surprise away
Three discreet methods work well. First: borrow a ring they already wear on the same finger (right-hand fourth finger is usually close enough to left-hand fourth) for half an hour and bring it in — we will measure it on a calibrated mandrel in two minutes. Second: trace the inside of an existing ring on paper, photograph the trace next to a coin for scale, and email it across. Third: ask a sibling or close friend who knows the size.
If none of those are possible, we make the ring at a sensible starting size (typically AU size N for a partner whose other rings are an unknown medium). One free resize within the first 2 months, for a change of up to three ring sizes. Most engagement rings can be resized up or down by two AU sizes without restructuring the design; full eternity bands cannot be resized at all, which is one of several reasons we discourage them as engagement rings.
We also keep printable ring sizers at the Frankston workshop and can post one out — message us via the contact page and we will pop one in the mail. If you would rather work it out now, our ring size converter and AU/UK size chart turns a millimetre measurement into an Australian size.
Insurance, valuations, and what to do after collection
Every ring we make leaves with a written valuation — a formal document, on letterhead, signed by a qualified valuer, listing the stone specifications, the metal, and the replacement value. You will need this to add the ring to your home and contents policy or a specified-item policy.
Most insurers want a fresh valuation every three to five years because gold and diamond markets move. We re-value rings made by us at a reduced fee, and we re-value rings made elsewhere as a standard service.
Beyond insurance: bring your ring to Frankston for a clean and claw-check once a year. Claws wear down — slowly, but they do — and a five-minute check at the bench catches a loose claw long before a stone is in any danger of falling out. The valuations and repairs services pages explain both in detail.
Talk with our jewellers — Frankston or Collins Street
Frankston is the workshop. It is the right room for first-time buyers because almost every stage of the process happens behind the counter — design, CAD, 3D printing, setting and finishing, with only the casting sent to a specialist casting house — and we can pull examples of every shape and setting out of the cabinet to compare in your hand. Walk-ins welcome; email us before a weekend visit.
Email us before visiting Collins Street for engagement-ring and wedding-ring consultations. Please wait for our email confirmation before coming in. It suits CBD professionals who want a private hour over their lunch break or after work. Same designers, same designs, same prices — just a quieter room and a faster commute from the city.
Either way, the first consultation is free and there is no pressure to commit on the day. Most customers take a week or two between the first conversation and approving the CAD. Email us to share your ideas.
Ready to start? Email us about a visit to our Frankston workshop, or before visiting Collins Street for an engagement-ring consultation. Want to browse first? See our engagement ring designs or compare diamond shapes on the shape comparison page.
Common questions
How much should you spend on an engagement ring?
There is no single right number. The old three-months-salary rule was an advertising slogan from the 1940s, not financial advice. A sensible budget is whatever leaves you comfortable the month after the ring is paid for. We work backwards from your budget to a design that respects it, rather than starting from a stone you have fallen for and forcing the maths.Which of the 4Cs matters most when choosing a diamond?
Cut, by a wide margin. Cut is what makes a diamond look alive — it controls how light enters, bounces, and returns to the eye. Colour and clarity are about thresholds (G colour and VS2 clarity is eye-clean for most shapes) rather than maximums. Carat is mass, not size; two diamonds of the same carat can look noticeably different from above.What is the best engagement ring shape for a first-time buyer?
Round brilliant is the safest first choice — it sparkles the hardest, suits the widest range of settings, and resells most easily. Oval is the most popular alternative because it looks larger per carat and elongates the finger. We always recommend seeing the shortlist in person at the Frankston workshop before committing — photos do not convey scale honestly.Are lab-grown diamonds a good choice for an engagement ring?
Yes — they are chemically and optically identical to natural diamonds, with the same hardness (10 on the Mohs scale) and the same sparkle. The trade-off is provenance, not quality. Lab-grown stones land at a meaningful discount to natural stones of the same spec, so the same budget buys noticeably larger or higher-spec.How long does it take to make a custom engagement ring?
Around 3–4 weeks from CAD sign-off to collection or delivery, made on-site at the Frankston workshop. That standard window applies whether we start from a blank custom brief or adapt an existing Anny's collection design; we'll confirm if stone availability or complexity changes it.How do I find out my partner's ring size without spoiling the surprise?
Three options work. Borrow a ring they already wear on the same finger for half an hour and bring it in — we measure it on a calibrated mandrel in two minutes. Or trace the inside of an existing ring on paper next to a coin for scale and email the photo across. Or ask a sibling who knows. If none of those are possible, we make at a sensible starting size. One free resize within the first 2 months, for a change of up to three ring sizes.Should I choose yellow gold, white gold, rose gold, or platinum?
Yellow gold is warm, traditional, and the kindest to lower-colour diamonds. White gold reads as modern but needs re-rhodium-plating every twelve to twenty-four months to stay bright white. Rose gold is the warmest and ages gracefully because of the copper in the alloy. Platinum is denser, more expensive per gram, and never needs replating.Do I need to insure my engagement ring?
Yes — every ring we make leaves with a written valuation on letterhead so you can add it to your home and contents policy or a specified-item policy. Most insurers want a fresh valuation every three to five years as gold and diamond markets move.