Interactive guide

How Big a Diamond Does
My Budget Buy?

Drag the slider to see exactly what carat size your budget gets you, in both natural and lab-grown diamonds. The difference is significant and worth understanding before you walk into any jeweller.

All figures assume a round brilliant cut, standard gold setting, and a stone with good cut quality and certification (GIA or equivalent). Prices are approximate London market averages at time of writing. Lab-grown prices have fallen significantly in recent years. The clarity grades on each card are explained, with a loupe, in the clarity guide, and the cut guide explains why "excellent cut" appears on every card.

Your budget
£5,000
£1,000 £5,000 £10,000 £15,000+
Natural diamond
0.90ct
Lab-grown diamond
2.00ct
Natural diamond
0.90ct
VS2 clarity · G colour · excellent cut

A premium natural stone with strong provenance and GIA certification.

Lab-grown diamond
2.00ct
VVS clarity · E–F colour · excellent cut

Visually identical to a natural stone worth multiples of your budget.

At £5,000, lab grown gives you more than twice the stone for the same money. Both are excellent quality with GIA certification. The only difference is origin.
At a glance

What Each Budget Buys

Every budget point on the slider, natural and lab-grown side by side. Round brilliant, certificated, at approximate London prices.

BudgetNatural diamondLab-grown diamond
£1,0000.20ctSI1 · H colour · good cut0.55ctVS2 · G colour · excellent cut
£2,0000.40ctSI1 · G–H colour · very good cut0.90ctVS2 · G colour · excellent cut
£3,0000.60ctVS2–SI1 · G colour · very good cut1.30ctVS1 · F–G colour · excellent cut
£5,0000.90ctVS2 · G colour · excellent cut2.00ctVVS · E–F colour · excellent cut
£7,0001.15ctVS1–VS2 · F–G colour · excellent cut2.80ctVVS · D–E colour · excellent cut
£10,0001.50ctVS1 · F colour · excellent cut3.80ctIF · D–E colour · excellent cut
£15,0002.20ctVS1 · E–F colour · excellent cut5.50ctIF · D colour · excellent cut
Continue the journey

How to Choose a Setting

Solitaire, halo, pavé, bezel: what each setting does, who it suits, and how to decide.

Read next

Or go straight to the Hatton Garden visit planner or the Top 100.

The evidence behind this guide

This is the only place online that ranks London's engagement ring jewellers on review evidence. I screened 1,120 London businesses, verified 305 as genuine engagement ring jewellers, and re-crawl their Google reviews every month, 57,304 reviews at the last count. Every listing is checked for district, walk-in access, natural or lab-grown stones and opening hours before it appears. The method is published in full on the Top 100, and rankings cannot be bought: editorial policy.