What is a centre stone?
By Jared James · Last updated 21 May 2026
Definition
A centre stone is the main gemstone in a piece of jewellery, the largest and most prominent stone placed at the focal point of the design. In an engagement ring it is the diamond or coloured gem that the setting is built around, and it is usually surrounded or complemented by smaller accent stones along the band or in a halo. The centre stone sets the character of the piece, and choosing its shape, size, quality and colour are typically the most significant decisions when designing a bespoke ring.
Frequently asked questions
- What is the most popular shape for a centre stone?
- The round brilliant cut has been the most popular centre stone shape for engagement rings for decades because its 57 or 58 facets are optimised to maximise brilliance. Oval, cushion, pear, princess and emerald cuts are all popular alternatives for those wanting something less traditional.
- How big should a centre stone be?
- There is no rule. The right size depends on the wearer's hand size, budget and personal style. A 1-carat round brilliant on a slender band looks substantial; the same stone on a wide band or small hand can look different again. Proportions matter as much as carat weight.
- Can a coloured gemstone be a centre stone?
- Absolutely. Sapphires, rubies, emeralds, aquamarines and many other gems make beautiful centre stones. The Princess of Wales's sapphire engagement ring is one of the most famous examples. Choosing a coloured centre stone is a growing trend and can offer excellent value compared with diamonds of comparable visual impact.
Designing a ring
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Tell us what you have in mind, even if it is only a budget and a piece of jewellery type, and we will help you weigh up the options. We reply to every enquiry, usually within one business day.
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