How to choose a diamond ring without overpaying

Most people buy one engagement ring in their life and get one shot at it. This is what to spend on, what to skip, and how to check you are getting what you pay for.

Spend on the cut. Save on the rest.

Diamonds are graded on four things: cut, colour, clarity and carat. They do not matter equally.

• Cut decides the sparkle. Buy an Excellent or Very Good cut grade before anything else. A well-cut smaller stone looks brighter than a bigger stone cut badly.
• Colour runs from D (no colour) to Z (tinted). Once the stone is set, most people cannot tell G or H from D. That is where the value sits.
• Clarity counts the natural marks inside the stone. Marks at VS and many SI grades are invisible without a loupe. Buy a stone that is clean to the eye, not a grade you will never see.
• Carat is weight, not size. Prices jump at the round numbers, so 0.90ct looks almost the same on the hand as 1.00ct and costs noticeably less.

Pick the shape she already likes

Round gives the most sparkle and costs the most per carat. Oval, cushion, pear and emerald look bigger for the same weight and cost less. Look at the jewellery she already wears before you decide: rounded or angular, plain or detailed.

Lab-grown or natural?

Same material, same grading, same sparkle. Lab-grown costs less for the same size and grade. Natural is rarer and holds its story. Both come with a grading report. The honest answer is that it depends on what she values, so ask her, or ask someone who knows her.

Only buy a certified stone

A GIA or IGI grading report is the only proof of what you are buying. The report number is laser-inscribed on the girdle of the stone, so we can show you the match under a loupe. Home tests you read about online (fog, water, scratching glass) do not tell a diamond from moissanite or a good imitation, so skip them.

Settings, in one line each

• Solitaire: one stone, the easiest to match a wedding band to.
• Halo: a ring of small diamonds around the centre stone, so it looks bigger for the money.
• Trilogy: three stones across the finger, more on the hand.
• Bezel: metal wrapped around the stone, the most secure for someone who works with their hands.

The budget question

There is no rule about months of salary. Set the number you are comfortable with, put most of it into cut, and let colour and clarity move down a grade if the carat matters to you. We will show you two or three stones side by side at the same price so you can see the trade-off yourself.

Four mistakes we see

• Paying for carat and ignoring cut, then wondering why it looks dull.
• Buying without a grading report.
• Guessing the ring size. Borrow one of her rings for a day, or ask us how to measure one at home.
• Buying for the trend rather than for the hand that will wear it every day.

Build it online or come in

The ring builder pairs our settings with certified diamonds from our suppliers at live prices, with no third party in between. Or book a consultation at 68 Langtree Avenue, Mildura, and we will lay the stones out in front of you.