Why are round diamond engagement rings more expensive than other shapes?

Round diamonds command a premium because approximately 50% of the rough stone is lost during cutting to achieve optimal light performance. This higher material waste, combined with overwhelming demand, makes round brilliants the most expensive shape per carat.

What is the ideal carat size for a round diamond engagement ring?

The most popular carat weight for round diamond engagement rings is 1.0ct, which measures approximately 6.5mm in diameter. For maximum value, consider 0.90–0.99ct stones — they appear virtually identical to 1ct but can cost 10–15% less.

Should I choose lab-grown or natural diamond for under £3,000?

Under £3,000, you can choose a larger lab-grown diamond (1ct–1.5ct) or a smaller but geologically rare natural diamond (0.5ct–0.7ct). Lab-grown maximises size and sparkle; natural offers rarity and tradition. Both are excellent choices.

Why are round diamond engagement rings more expensive than other shapes?

Round diamonds command a premium because approximately 50% of the rough stone is lost during cutting to achieve optimal light performance. This higher material waste, combined with overwhelming demand, makes round brilliants the most expensive shape per carat.

What is the ideal carat size for a round diamond engagement ring?

The most popular carat weight for round diamond engagement rings is 1.0ct, which measures approximately 6.5mm in diameter. For maximum value, consider 0.90–0.99ct stones — they appear virtually identical to 1ct but can cost 10–15% less.

Should I choose lab-grown or natural diamond for under £3,000?

Under £3,000, you can choose a larger lab-grown diamond (1ct–1.5ct) or a smaller but geologically rare natural diamond (0.5ct–0.7ct). Lab-grown maximises size and sparkle; natural offers rarity and tradition. Both are excellent choices.

Round Brilliant Engagement Rings Under £3,000

Handcrafted · Hatton Garden, London

The round brilliant cut features 58 precisely arranged facets mathematically optimised to maximise light return, fire, and scintillation. Accounting for over 60% of all engagement rings sold worldwide, the round brilliant is the most researched and refined diamond shape in existence. Its symmetrical silhouette offers unmatched sparkle from every angle.

The £2,000–£3,000 range unlocks larger lab-grown diamonds (1.5ct+) or your first natural diamond engagement ring. This is where the full breadth of MOH's collection becomes available.