Diamond Stud Earrings: A Buying Guide to Carats, Cuts and Size

Diamond stud earrings are the piece most of us wear more than any other jewellery we own. They go on in the morning and often stay in for years, so it pays to choose with care. In this guide I have used the Suzanne Kalan studs we carry to show what each carat weight, cut and size actually looks like on the ear, and the full edit of diamond stud earrings is there to browse as you read. A good first reference point is the Classic Diamond Bar Studs in 18K White Gold, a slim line of 0.18 carats of baguette diamonds at around $2,600 at Coveti.

Which diamond studs should you buy? For most people, 0.3 to 0.7 carats with stones of 3 to 5 mm is the everyday sweet spot; go under 0.25 carats for discretion and 1 carat upwards for a statement. At Coveti, Suzanne Kalan studs start at around $1,080, the median is around $3,500, and diamond pairs run to around $11,860.

Solitaire against cluster

When most people picture a diamond stud, they picture a single round stone on a post. That is the solitaire stud, and its appeal is purity: one diamond, nothing to distract from it. Its weakness is cost. A single large diamond is rare, so price rises steeply with size.

A cluster stud groups several smaller stones into one shape. It looks bigger than its carat weight suggests and usually costs less for the same visual impact. Suzanne Kalan specialises in this approach, especially with baguettes. The Classic Diamond Cluster Studs in 18K Yellow Gold group 0.35 carats of baguettes into a compact burst for around $3,630.

Neither style is better. A solitaire is quieter and very classic. A cluster has more personality and more movement, because each facet faces a slightly different way.

How many carats?

Carat weight is the main driver of price, but on a stud it matters less than you might think, because the ear is small and the eye reads the outline as much as the weight.

A rough guide, using real pieces:

As a rule of thumb, anything under about 0.25 carats reads as a glint, lovely for a second piercing and for anyone who rarely wears jewellery. Between 0.3 and 0.7 carats is the everyday sweet spot. Around 1 carat and above, the studs start to become the focus of the face.

One tip: when you compare listings, check whether a carat figure covers the pair. It is the most common source of confusion when shopping for studs, so ask if a listing is not clear.

Size in millimetres

For square and round stones, millimetres tell you more than carats about how a stud will look. Suzanne Kalan’s princess-cut studs are sized by stone, which makes this easy to judge.

The Princess Mini Diamond Studs in 18K White Gold centre on 3 x 3 mm princess-cut diamonds, 0.32 carats, with 0.21 carats of baguette and round diamonds round them, for around $4,810. A 3 mm stone is discreet and suits small lobes. Step up to the Princess Midi Diamond Studs in 18K White Gold, with 4 x 4 mm princess-cut diamonds totalling 0.70 carats plus 0.24 carats of accent diamonds, and the difference on the ear is obvious. They are around $11,860, the top of our diamond stud range.

If you are unsure, hold a ruler up to your earlobe in a mirror. Most people find 3 to 5 mm looks natural for every day.

Which cut?

Round brilliant

The round brilliant has 57 to 58 facets and gives the most sparkle per carat. It is the default for a reason, and it suits everyone. Many Suzanne Kalan studs use round diamonds as accents round baguettes, which softens the outline.

Princess cut

A princess cut is a square brilliant. It has nearly the same fire as a round stone but a sharper, more modern outline. The Golden Diamond Mini Studs in 18K White Gold, from the Golden Age collection of princess-cut stones in more polished gold, carry 0.35 carats for around $3,930 at Coveti.

Baguette

A baguette is a long rectangular step cut. It gives broad flashes of light rather than pinpoint sparkle, and it is Suzanne Kalan’s signature. Her Fireworks setting places baguettes at offset, scattered angles, so each stone catches light on its own. Our article on Suzanne Kalan Fireworks baguette jewellery explains the technique. On studs it gives a look you will not mistake for anything else, as in the Classic Diamond Spark Studs in 18K White Gold, 0.69 carats for around $5,980.

Shapes and motifs

Studs are a good place to have a little fun. The La Fantaisie Star Diamond Studs in 18K Yellow Gold, from the collection built on stars and celestial shapes, carry 1.06 carats of princess-cut and round diamonds for around $8,340. The Classic Diamond Small Heart Studs in 18K Rose Gold, 0.78 carats, are around $8,920. For something more graphic, the Bold ZigZag Diamond Studs in 18K Yellow Gold set 0.70 carats of baguettes for around $6,280.

Choosing the metal

Suzanne Kalan diamond studs are made in solid 18 carat gold, 75% pure, and most come in yellow, white and rose. Choose the gold that matches the jewellery you wear most, especially the rings you never take off.

White gold makes diamonds look whiter and is the classic choice for a solitaire look. It is usually rhodium plated, so expect it to need re-plating over the years. Yellow gold gives baguettes a warm glow. Rose gold is softer and flatters most skin tones.

Fit and comfort

A stud should sit flat against the lobe without tilting forward. Heavier cluster studs need a secure back to hold them upright, so check how the pair feels after a full day before you decide they are your forever earrings. If you plan to sleep in them, smaller, flatter designs are kinder.

Bar studs, like the Classic Diamond Mini Bar Studs in 18K Yellow Gold at 0.14 carats for around $2,160, are a good choice for upper-ear piercings, where space is tight.

A quick checklist before you buy

Before you commit, run through a few questions. Is the carat figure for the pair? What is the size of the main stone in millimetres? Does the metal match the rings you wear daily? Will the design sit flat when you lie on it, if you plan to sleep in your studs? And is it a shape you will still love in ten years? A heart is charming. A plain bar is something you will reach for without thinking. Both are good answers, but they are different answers, and it helps to know which one you are after.

Coloured alternatives

If you want sparkle with a little colour, sapphire is the practical choice. It is corundum, 9 on the Mohs scale, so it handles everyday wear almost as well as diamond. The Shimmer Rainbow Sapphire Studs in 18K Rose Gold set 0.75 carats of rainbow sapphire baguettes with 0.14 carats of round diamonds for around $3,930.

For the lowest price point, look at the Amalfi collection, made in 14 carat gold. The Amalfi Hexagon Studs in 14K Yellow Gold, Citrine are around $1,080 at Coveti, the entry point to the whole Suzanne Kalan earring range.

How to wear diamond studs

A diamond stud needs no styling, which is half its charm. Wear a pair alone in the first piercing and let it do its job. If you have several piercings, build upwards with smaller pieces: a stud in the lobe, a huggie above it, then a tiny bar at the top. Our guides to huggie earrings and gold hoop earrings help plan the rest of the ear.

Keeping one metal across an ear looks polished. Mixing them works too, as long as it looks deliberate, and it makes most sense if your rings are already mixed.

Care

Studs collect skin oils and hair products, which dulls the stones quickly. Soak them in warm water with a drop of mild soap, brush gently behind the stones with a soft toothbrush, rinse and dry. Store each pair in its own pouch, since diamond will scratch gold and other stones.

Buying Suzanne Kalan diamond studs at Coveti

Suzanne Kalan has made jewellery since 1988. Every piece is handcrafted and made in America, and the house is credited with redefining how baguette diamonds are used. Coveti carries 310 of her studs, all 100% authentic, and ships worldwide from London. If you are weighing her against other designers, our piece on brands like Suzanne Kalan may help, and the full range is on the Suzanne Kalan brand page.

Frequently asked questions

What size diamond studs should I buy?

For everyday wear, diamond studs of around 0.3 to 0.7 carats, with stones of 3 to 5 mm, suit most people. Under 0.25 carats is discreet and ideal for second piercings, while 1 carat and above becomes a statement. Hold a ruler to your lobe in a mirror to judge which size looks natural on you.

How much do diamond stud earrings cost?

At Coveti, Suzanne Kalan studs start at around $1,080, with a median of around $3,500. Diamond pairs begin around $2,160 for the Classic Diamond Mini Bar Studs at 0.14 carats and reach around $11,860 for the Princess Midi Diamond Studs with 4 x 4 mm princess-cut diamonds. Price follows carat weight and stone size.

Are cluster studs better than solitaire studs?

Cluster studs are not better, but they often look larger for the money. A cluster groups several small diamonds into one shape, so it gives more visible sparkle per carat than a single stone. A solitaire is quieter and more classic. Choose a cluster for personality and value, and a solitaire for pure simplicity.

Which gold is best for diamond stud earrings?

White gold makes diamonds look whiter and is the classic choice, though it is usually rhodium plated and may need re-plating over the years. Yellow gold warms baguettes and suits warmer skin tones, and rose gold is soft and flattering. Suzanne Kalan studs come in 18 carat gold in all three colours.

Can you wear diamond studs every day?

Yes, diamond is 10 on the Mohs scale, so diamond studs are made for daily wear. Choose a flatter design if you plan to sleep in them, clean them every few weeks with warm soapy water and a soft brush, and check the backs regularly to make sure each pair stays secure.

What is the difference between baguette and round diamond studs?

A round brilliant has 57 to 58 facets and gives pinpoint sparkle, while a baguette is a long rectangular step cut that gives broad flashes of light and a more graphic look. Suzanne Kalan is known for baguettes, often set at offset angles in her Fireworks arrangement and mixed with round diamonds.