Lab-Grown Diamond Stud Earrings: Sizes, Prices & Metals
Five diamond sizes from 0.30 to 1.50 ct per ear, styling for men and women, and a comparison of four- and six-prong settings
For your first pair of round diamond studs, start by comparing 0.30, 0.50 and 0.80 ct per ear. Try 1.00 or 1.50 ct if you want a bolder look. This guide compares how the sizes look on the ear, diamond grades, settings, metals and prices for one stud or a pair.
On this page Size ｜ Fit and diamond grades ｜ Settings ｜ Metals ｜ Care ｜ Prices ｜ Fitting checklist ｜ FAQs ｜ Summary
How big are 0.30 to 1.50 ct studs per ear?
The examples use one round brilliant lab-grown diamond in each stud. Carat measures weight, while diameter in millimetres is a better guide to face-up size. Two diamonds of the same weight can have different proportions. Use our Diamond Size Guide for reference and the grading report for the actual diameter.
0.30 ct ｜ 0.50 ct ｜ 0.80 ct ｜ 1.00 ct ｜ 1.50 ct
The top row shows a man's ear and the bottom row a woman's ear. The illustrations compare five sizes. How a stud looks will vary with earlobe size and piercing placement.
Per ear | Pair total | Approx. diameter | Face-up impression |
0.30 ct | 0.60 ct | 4.3 mm | Subtle for everyday wear or a second piercing |
0.50 ct | 1.00 ct | 5.2 mm | Defined outline, a good first pair |
0.80 ct | 1.60 ct | 6.0 mm | More presence while still easy to wear |
1.00 ct | 2.00 ct | 6.5 mm | An ear-level focal point; check setting height |
1.50 ct | 3.00 ct | 7.4 mm | A bold look; check support and forward tilt |
A 1.00 ct total-weight pair with equal-sized diamonds has 0.50 ct in each ear. At 1.00 ct per ear, the pair totals 2.00 ct. For halo or accent designs, check whether the stated total includes the accent stones.
How to choose a size and fit
Styling illustrations. A dark jacket and white shirt on the left, and tied-back hair with a dark top on the right.
For a single stud, a 0.30 to 0.50 ct four-prong style looks clean with a shirt or jacket. Try 0.80 to 1.00 ct for a more noticeable stud. A six-prong setting at the same diameter has a rounder, more classic outline.
For a pair, tied-back hair makes the studs easier to see against a dark top. Try 0.30 to 0.50 ct per ear for everyday wear, or 0.80 to 1.00 ct for more presence. At 1.50 ct per ear, check from the side that the backs give enough support.
Check the front and side. Step back to a normal conversation distance to see whether the studs sit evenly. Turn sideways to check the height and any forward tilt. Try them with glasses, earphones or a mask if you wear those regularly.
Do everyday studs need premium diamonds?
Standard-grade diamonds are a good starting point. At normal conversation distance, neighbouring colourless grades and small inclusions are often hard to distinguish. A pair's matching diameter, colour, transparency and brightness usually make a more noticeable difference.
Our finished studs use standard-grade diamonds by default. The four-prong single stud 600614, for example, comes with a D–F colour, VS or higher clarity, and Good or better cut, with an IGI report.
For everyday wear, start with F colour, VS2 clarity and Very Good or better cut. Prioritise an Excellent-cut round diamond and an IGI report. Match the diameters and colour of a pair, then compare how clear and bright both stones look in the same light. See our standard-grade round diamond specifications.
For a higher specification, consider D colour, VVS2 or better clarity and 3EX with a GIA report. 3EX means Excellent cut, polish and symmetry. We also assess the diamond in person and use our DAII™ quality assessment.
To upgrade, open Select a Diamond and choose lab-grown, round and GIA, then filter by your preferred grades. For 18K gold, you can select the setting without the centre stone and choose a loose diamond. Contact us for a matched pair or for help pairing premium diamonds with white-finished sterling silver or PT950 platinum.
Four prongs, six prongs and setting profiles
From left to right in the original comparison: tapered four-prong, flat basket four-prong and tapered six-prong. The side-profile illustration compares the two four-prong settings where the basket meets the post.
Four prongs create a clean outline with fewer metal contact points. Six prongs spread the contact points around the diamond and tend to emphasise the round shape. At 0.30 ct, check that the prong tips do not dominate. Four prongs can also work for larger diamonds when the prong fit, basket and workmanship are appropriate. See the classic six-prong style 600406.
From the side, a tapered basket narrows towards the post. A flat basket has a wider base and can provide a larger contact area at the front of the ear. Either can sit close to the ear. How far it projects depends on the stone depth, basket height and back placement. If your piercing sits low or the lobe is thin, try both to see which sits more securely.
A pointed base usually describes the setting tapering behind the stone. The diamond's culet is part of the stone, while the earring back holds the stud behind the ear. Ask about basket height, post length and the area where the back touches the lobe.
Our studs use smooth posts. A secure back should leave the earlobe comfortable. If a larger stud tips forward, ask about a back with a wider support area and check that the post length suits your earlobe.
White-finished sterling silver, 18K gold and PT950 platinum
Our white-finished silver option uses 925 sterling silver. It, 18K white gold and PT950 platinum studs all have a white surface finish. The same new design can look similar under the same light, so compare budget, weight and upkeep. Read our comparison of the three precious metals.
White-finished silver ｜ 18K white gold ｜ 18K yellow gold ｜ 18K rose gold ｜ PT950 platinum
A 45-degree view of the same four-prong stud design shows the diamond face, basket and post.
White-finished sterling silver is a budget-friendly option with a bright white appearance. If an area darkens, have the finish checked. If the post or basket is bent, have the structure checked first. See sterling silver properties and care.
18K gold is available in white, yellow and rose. All three contain 75% gold. On the white option, the surface can wear where the back or basket comes into contact. A jeweller can inspect and refinish it if needed.
PT950 platinum suits those who prefer the feel of platinum or a naturally silver-white base metal. With larger studs, try them on to check how the extra weight and earring backs feel.
For a four-prong pair at 0.50 ct per ear, white-finished sterling silver is HK$4,500 (NT$18,000 / RM2,340) and 18K white gold is HK$7,200 (NT$28,800 / RM3,744). The difference is HK$2,700 (NT$10,800 / RM1,404).
What to ask about sensitive piercings
If you have a history of nickel sensitivity, check the post, back and rear of the basket that touch the skin. The 18K and 925 marks describe purity. Ask the jeweller to confirm the alloy and finish on each contact part and compare options verified as nickel-free. A white finish can wear, so check the underlying metal too.
If your piercing is still healing, ask a professional piercer about the appropriate size and material. Implant-grade titanium is an option to discuss. If a healed piercing repeatedly itches or develops a rash or swelling after wear, take the earrings off and consult a dermatologist.
American Academy of Dermatology on nickel allergy ｜ DermNet on jewellery allergy ｜ Materials for initial piercings
Cleaning at home and in-store refurbishment
Everyday cleaning
Use a soft, non-abrasive cloth to wipe the studs gently.
After taking the studs off, gently wipe away sweat and oils with a soft, non-abrasive cloth. Allow them to dry before storing them separately. Remove them before using perfume or hairspray, or before swimming. For white-finished sterling silver, avoid silver dips and repeated rubbing with a silver polishing cloth. See our diamond cleaning and care guide.
In-store refurbishment
The studs rest on a soft pad while a jeweller examines the prongs and baskets with a loupe.
A jeweller checks the prongs, posts and backs before cleaning, adjusting, polishing or refinishing as needed. If the silver darkens locally, white gold shows a warmer colour or PT950 develops visible scratches, bring both studs in for inspection.
Aftercare. Eligible RAGAZZA pieces include one complimentary maintenance and repair service per service period. Work depends on the inspection and the aftercare terms. Bring your original order details and point out any loose backs or areas of finish wear.
How much do lab-grown diamond studs cost?
The prices below compare our four-prong pair 600418 and four-prong single stud 600614 with standard-grade lab-grown round diamonds. The carat weight shown is for one diamond in one ear.
HKD is the finished-piece price. TWD and MYR in brackets are approximate, rounded to whole units using HK$1 = NT$4 and HK$1 = RM0.52.
Pair prices for two studs
Per ear | 18K white gold | White-finished sterling silver |
0.30 ct | HK$6,200 (NT$24,800 / RM3,224) | HK$3,500 (NT$14,000 / RM1,820) |
0.50 ct | HK$7,200 (NT$28,800 / RM3,744) | HK$4,500 (NT$18,000 / RM2,340) |
0.80 ct | HK$8,700 (NT$34,800 / RM4,524) | HK$6,000 (NT$24,000 / RM3,120) |
1.00 ct | HK$11,000 (NT$44,000 / RM5,720) | HK$6,500 (NT$26,000 / RM3,380) |
1.50 ct | HK$14,500 (NT$58,000 / RM7,540) | HK$10,000 (NT$40,000 / RM5,200) |
Single-stud prices
Per ear | 18K white gold | White-finished sterling silver |
0.30 ct | HK$4,300 (NT$17,200 / RM2,236) | HK$2,500 (NT$10,000 / RM1,300) |
0.50 ct | HK$4,800 (NT$19,200 / RM2,496) | HK$3,000 (NT$12,000 / RM1,560) |
0.80 ct | HK$5,550 (NT$22,200 / RM2,886) | HK$3,750 (NT$15,000 / RM1,950) |
1.00 ct | HK$7,600 (NT$30,400 / RM3,952) | HK$4,000 (NT$16,000 / RM2,080) |
1.50 ct | HK$9,350 (NT$37,400 / RM4,862) | HK$5,750 (NT$23,000 / RM2,990) |
At 0.80 ct per ear, a four-prong pair is HK$6,000 (NT$24,000 / RM3,120) in white-finished sterling silver and HK$8,700 (NT$34,800 / RM4,524) in 18K white gold. A single stud is HK$3,750 (NT$15,000 / RM1,950) or HK$5,550 (NT$22,200 / RM2,886), respectively. Singles and pairs have their own setting prices.
The tapered six-prong style 600517 in 18K white gold costs HK$5,550 (NT$22,200 / RM2,886) per pair at 0.50 ct per ear and HK$9,350 (NT$37,400 / RM4,862) at 1.00 ct per ear. The equivalent white-finished silver pairs are HK$4,500 (NT$18,000 / RM2,340) and HK$6,500 (NT$26,000 / RM3,380).
Comparing options on a similar budget
At around HK$6,500 (NT$26,000 / RM3,380), consider the four-prong flat basket in white-finished sterling silver at 1.00 ct per ear. In 18K white gold, try the 0.30 ct four-prong flat basket at HK$6,200 (NT$24,800 / RM3,224), or the 0.50 ct tapered six-prong option at HK$5,550 (NT$22,200 / RM2,886).
Fitting and buying checklist
Check the weight and complete price. Confirm single or pair, carat weight per ear, metal and diamond grade. Two 0.50 ct diamonds make a 1.00 ct pair. Confirm that the quote includes both stones, settings and backs when buying a pair.
Try adjacent sizes in the same setting. For example, compare 0.50 and 0.80 ct in the same four-prong style. Look in the mirror, then step back to a normal conversation distance.
Match the diamonds in the same light. Compare diameter, colour, transparency and brightness side by side, then check both reports. If possible, look in indoor light and daylight.
Try both studs from the front and side. Check how evenly they sit and whether they lean forward. With a thin lobe or low piercing, compare a lower setting or a different back.
Check the back with your everyday accessories. It should be secure and comfortable. Try the studs with your glasses, earphones or mask and see whether they catch as you take them off.
For a sensitive piercing, confirm the materials that touch the skin. Ask about the post, back and rear of the basket, especially if you know you are sensitive to a particular metal.
Keep the style code and both diamond reports. Note the metal colour, basket and back. Bring the original stud when matching a replacement, changing a back or arranging refurbishment.
Frequently asked questions
1. Should I start with 0.50 or 0.80 ct studs?
A 0.50 ct diamond is about 5.2 mm and a 0.80 ct diamond about 6.0 mm. Try both and step back to a normal conversation distance. If your lobes are thin, check from the side which sits more securely.
2. Should men choose four or six prongs for one stud?
Try four prongs for a clean look with a shirt or jacket. If you prefer a rounder outline, compare six prongs at the same diamond diameter.
3. My 1.00 ct stud tips forward. Would six prongs help?
Check the setting height, piercing position and earring back first. A lower basket or a back with a wider support area may work better. Check that the stud feels secure and comfortable.
4. Can I use a back from another earring?
The opening and grip can differ. Bring the stud and the other original back so we can check the post's thickness, length and fit.
5. Where can I choose a higher-grade diamond?
Use Select a Diamond to browse GIA-graded round lab-grown diamonds. Start with D colour, VVS2 or above and 3EX. If buying a pair, ask us to match them side by side.
6. The three white metals look similar. How should I choose?
White-finished sterling silver can help keep the price down. 18K white gold is an option for frequent wear. Try PT950 if you prefer the feel and weight of platinum.
7. My studs look dull. Do they need refurbishment?
Check whether the dullness is on the diamond, prongs, basket or back. Clean surface oils from the diamond first. If the metal is still dark in places or visibly scratched, bring the studs in for inspection.
8. White-finished sterling silver feels itchy. Will switching to 18K help?
Check the post, back and basket material and whether the back is too tight. If you know you are sensitive to nickel, choose parts confirmed to be nickel-free. Consult a dermatologist if itching or a rash keeps returning.
9. If I buy one stud now, can I match it later?
Keep the style code, metal, diamond diameter and report details. Bring the original so we can compare colour, brightness, prongs and basket height side by side.
10. Why do two diamonds of the same carat weight look different on the ear?
Compare the diameters on the reports, then swap the studs between ears. This can help identify whether the difference comes from face-up size, the settings or piercing placement.
What to try first
For a first pair, start with a standard-grade round diamond of about 0.50 ct and 5.2 mm per ear. For more presence, compare 0.80 and 1.00 ct and check how well they are supported. If you want premium specifications, use Select a Diamond and ask us to confirm the pair and settings.
