Diamond: The Timeless Brilliance of April’s Birthstone

April-born are the only people who get a birthstone that doubles as the world's most popular engagement stone. Diamond has been April's designated birthstone for centuries, and it remains by far the hardest, most durable, and most-purchased gem in modern fine jewellery. This guide covers what makes diamond unique among gemstones, where the tradition came from, and how to choose one if you are buying an April birthday gift.

In short: Diamond is April's birthstone — pure crystallised carbon, hardness 10 on the Mohs scale, and the world's most-purchased gemstone. Most jewellery diamonds are colourless or near-colourless (D-J on the GIA scale). Lab-grown diamonds are chemically identical to mined and cost 60-70% less for the same grade. A 1-carat lab-grown solitaire pendant starts around £1,200-2,500; mined equivalents cost roughly 2.5x more.

Diamond at a glance

Diamond is pure crystallised carbon — the same element as graphite in pencils — arranged in a rigid three-dimensional lattice that gives it a Mohs hardness of 10, the maximum on the scale. Refractive index 2.42 and dispersion of 0.044 produce the brilliance and rainbow "fire" that no other transparent gemstone matches. Natural diamonds form 150 kilometres below the earth's surface under intense pressure and reach us through ancient kimberlite eruptions, most of which ended 70 million years ago.

Why April got diamond

The modern birthstone list was standardised in 1912 by the National Association of Jewelers (now Jewelers of America) and revised slightly in 2002 and 2016. Diamond's place as April's stone predates this — Polish poet Witold Wirpsza traces it back to a 15th-century European custom of assigning gems to months based on biblical references. Earlier traditions, including ancient Polish and Hebrew sources, also linked diamond with spring months. What is consistent across centuries: diamond as a symbol of strength, eternal love, and clarity of purpose — fitting attributes for the start of the season.

Diamond colour beyond colourless

Most diamonds in fine jewellery are colourless or near-colourless (D to J on the GIA scale), but diamond occurs naturally in every colour. Yellow and brown are the most common fancy colours; pink, blue, green, and red are rare. Boron creates the famous blue of the Hope Diamond. Nitrogen makes yellow. Structural distortion under pressure produces pink and red — the rarest of all, with fewer than 30 pure red diamonds publicly documented worldwide.

The lab-grown alternative

Lab-grown diamonds are chemically and optically identical to mined diamonds and are graded by the same labs (GIA, IGI) on the same 4Cs. They typically cost 60–70% less for the same carat, colour, and clarity grade. For an April birthday gift where the budget allows, lab-grown delivers a noticeably larger or higher-grade stone for the same spend. Reve Diamonds stocks both lab-grown and mined diamonds across every shape and size.

Choosing a diamond for April-born

Diamond fits any setting style, so the question is more about taste than constraint. Round brilliant remains the most popular cut for its maximum brilliance. Oval, pear, and marquise cuts look slightly larger on the finger for the same carat weight. For pendants and earrings, smaller carat sizes (0.20–0.50 each) work well for daily wear; larger stones (1 carat plus) suit statement pieces or anniversary gifts. Always insist on independent certification (GIA or IGI) for any diamond above 0.30 carats.

Caring for diamond jewellery

Diamond is the hardest mineral known, so it does not scratch in normal wear — but it can still be chipped by hard knocks at the right angle, and the metal it is set in can wear down faster. Routine cleaning with warm water and mild soap every six months keeps any diamond bright. Avoid wearing diamond jewellery during heavy manual work, climbing, or gym sessions. Have prongs inspected annually by a jeweller.

Frequently Asked Questions

Is diamond a good birthstone choice for everyday wear?

Yes — diamond is the most durable gemstone available, so a diamond pendant, earring, or ring will hold up to daily wear better than any other birthstone. The setting is the weak point, not the stone itself. Choose 18ct gold or platinum for the mounting and have prongs inspected annually.

Are lab-grown diamonds suitable for an April birthday gift?

Absolutely. Lab-grown diamonds are the same material as mined diamonds, certified the same way, and indistinguishable to the naked eye. They cost 60–70% less, which means a larger or higher-quality stone for the same budget. For a milestone April gift, lab-grown often delivers more visual impact than a mined alternative at the same price point.

What is the most popular diamond shape for a birthday gift?

Round brilliant is the most popular for engagement-style pieces because of its maximum brilliance. For pendants and earrings, oval and pear shapes are increasingly favoured because they look slightly larger than rounds of the same carat weight. Princess cut and cushion cut are popular alternatives that retain strong sparkle.

How much should I spend on a diamond birthday gift?

Diamond pendants in 14ct or 18ct gold with a 0.20-carat lab-grown stone start around £200–£400. Stud earrings (0.50 carats total) start around £500–£800. A 1-carat lab-grown solitaire pendant or ring sits at £1,200–£2,500. Mined diamond equivalents cost roughly 2.5–3 times more across each tier. Set the budget you can comfortably spend and we will find the best stone to match it.

Does diamond have any meaning beyond the 4Cs?

Across cultures and centuries, diamond has symbolised strength, clarity, eternal commitment, and protection. The Greeks called it adamas — "unconquerable" — which is the root of our word "adamant". Medieval European tradition held that diamonds gave the wearer courage in battle. Modern symbolism tends to focus on enduring love and lasting commitment, which is why diamond remained the dominant engagement-ring stone after the 20th century.

Explore diamond jewellery at Reve

Reve Diamonds creates bespoke diamond pendants, earrings, and rings in our London showroom. Browse our engagement rings collection or visit us for a consultation on a custom April birthday piece.