The Pre-Appointment Checklist
Five things to sort out before you walk into any jeweller. Takes two minutes. Saves hours of second-guessing once you are there.
Know her style specifically, not vaguely
Every jeweller will ask what she likes, and "simple" or "she's not really into jewellery" is not enough to work with. Before you go, look at what she actually wears: the metal colour (yellow gold, white gold, rose gold, silver), whether the pieces she chooses are minimal or detailed, whether she tends toward classic shapes or something more distinctive. If she wears jewellery rarely, that usually means she is particular rather than indifferent. A classic round diamond in yellow or white gold covers the most ground. If you think she is more individual, look at what she pins or saves online. One concrete reference point — a piece she already owns, a picture she has saved — is worth more than ten adjectives.
Try the ring style finder →Decide on a number before you sit down
Every good jeweller will ask your budget early. This is not pressure, it is practical: they need to know which stones to show you. If you refuse to say or cannot say, you will waste time and theirs. A well-chosen engagement ring with a good natural diamond is available from around £3,000 in London. Between £5,000 and £10,000 you gain noticeably on stone quality. Above £10,000 you are buying into a different tier entirely. Lab-grown diamonds cost roughly a third as much as natural for equivalent specifications. Decide where you stand on both before you arrive, and have a range rather than a ceiling — something like “around £6,000 to £8,000” is a useful answer.
Read the budget guide →Understand cut before anything else
Of the four factors that determine a diamond's quality (cut, colour, clarity, and carat), cut is the only one that directly affects how beautiful the stone looks. A well-cut diamond returns light brilliantly. A poorly-cut stone looks flat and dull, regardless of its other grades. When a jeweller shows you stones, cut grade is the first thing to ask about. For GIA-certified diamonds, Excellent or Very Good cut is the target. Do not trade cut quality for carat size: a well-cut 0.9ct stone will look more impressive than a poorly-cut 1.1ct stone at the same price. Jewellers who push carat at the expense of cut are not serving your interests.
Read the full 4Cs guide →Know your position on lab-grown diamonds
Nearly every jeweller will offer both natural and lab-grown diamonds, and you will be asked to choose. Lab-grown diamonds are chemically and physically identical to natural diamonds — same hardness, same optical properties, same appearance. The difference is origin and economics. Lab-grown diamonds are made in weeks, supply is essentially unlimited, and prices continue to fall. A lab-grown diamond of equivalent quality costs roughly a third of a natural diamond. Natural diamonds are genuinely scarce and hold their value significantly better. Lab-grown diamonds do not retain value. Neither choice is wrong, but it is worth deciding before you are sitting in front of a stone tray and being asked directly.
Natural vs lab-grown in the FAQ →Do not buy on the first visit
This is the most important item on this list. No good jeweller will pressure you to decide on the day. The first visit is for research: see how they present stones, listen to how they explain things, notice whether they ask questions about her or simply show you what they want to sell. The way a jeweller treats you when there is no sale to close tells you everything about how they will treat you when there is. Visit at least two jewellers before committing. The difference between a confident purchase and a nagging doubt often comes down to having done that comparison. Take the time. It is the most significant piece of jewellery most people ever buy.
Our recommended jewellers →Where to go from here
London by District
Every major London jewellery district covered, with honest assessments of who is worth visiting and why.
Explore → Editorial shortlistBest Jewellers in London
The jewellers we would recommend to a close friend, across all districts and all budgets.
View list → Free toolWhat Does My Budget Get Me?
Four questions. A specific answer: carat size, quality, and an honest comparison of natural vs lab-grown at your price point.
Take the quiz →