Synthetic diamonds
Synthetic diamonds for sale on Ireland's largest auction and classifieds sites
Unfoiled zircon stones - unfoiled, - £4.99
Eimass hotfix rhinestones • Gembond clear glue • Non hot fix - Free postage - New and Used
Eimass hotfix rhinestones • Gembond clear glue • Non hot fix - Free postage - New and Used
Synthetic diamond - synthetic, - £94.30
1.15 synthetic diamond • Round brilliant cut • Grade excellent polish - Free postage - New and Used
1.15 synthetic diamond • Round brilliant cut • Grade excellent polish - Free postage - New and Used
Color diamond colorless - 5, - £24.02
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Lab grown cvd diamond pair - grown, 6 - £363.82
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
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Synthetic diamond - synthetic, - £109.90
1.30 synthetic diamond • Round brilliant cut • Grade excellent polish - Free postage - New and Used
1.30 synthetic diamond • Round brilliant cut • Grade excellent polish - Free postage - New and Used
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48 listings · from £2.75 · avg £156.55
⚠️ These listings were last updated more than 24 days ago.
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Browse 48 synthetic diamonds listings currently in our index. Prices range from £2.75 to £1199, with an average of £156.55. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about synthetic diamonds →
Carat synthetic diamonds - carat, - £6.45
Als andere sites • Goedkopere producten vinden • Die het eerste - Free postage - New and Used
Als andere sites • Goedkopere producten vinden • Die het eerste - Free postage - New and Used
9ct synthetic ruby diamond - 9ct, - £159.99
This charming 9ct • Gold ring features • Beautifully crafted bow - Free postage - New and Used
This charming 9ct • Gold ring features • Beautifully crafted bow - Free postage - New and Used
2026 are - 25-3-2026, - £4.41
- Free postage - New and Used
- Free postage - New and Used
White color vvs1 moissanite - white, - £42.52
These gorgeous stones • Are impressive worth • Paying little more - Free postage - New and Used
These gorgeous stones • Are impressive worth • Paying little more - Free postage - New and Used
Gram synthetic diamonds - 1, - £18.32
You check other • May find cheaper • Products that first - Free postage - New and Used
You check other • May find cheaper • Products that first - Free postage - New and Used
Synthetic diamonds gems - gems, & - £59.98
Gems gemology review • Synthetic diamonds first • Series books that - Free postage - New and Used
Gems gemology review • Synthetic diamonds first • Series books that - Free postage - New and Used
Presidium synthetic diamond - synthetic, - £888.29
Synthetic diamond screener • From presidium you • Can reliably select - Free postage - New and Used
Synthetic diamond screener • From presidium you • Can reliably select - Free postage - New and Used
2026 are - 25-3-2026, - £3.31
- Free postage - New and Used
- Free postage - New and Used
Igl certified loose - igl, - £78.62
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Moissanite round cut - moissanite, - £143.90
These gorgeous stones • Are impressive worth • Paying little more - Free postage - New and Used
These gorgeous stones • Are impressive worth • Paying little more - Free postage - New and Used
Aaa dark green - dark, moissanite - £38.71
These gorgeous stones • Are impressive worth • Paying little more - Free postage - New and Used
These gorgeous stones • Are impressive worth • Paying little more - Free postage - New and Used
900 platinum natural - pt, - £394.30
This piece perfectly • Mirrors design earrings • Making incredibly sophisticated - Free postage - New and Used
This piece perfectly • Mirrors design earrings • Making incredibly sophisticated - Free postage - New and Used
2026 are - (2397), - £3.86
- Free postage - New and Used
- Free postage - New and Used
Tru diamond ring - , - £60.00
- Free postage - New and Used
- Free postage - New and Used
9ct gold hallmarked diamond - 9ct, - £219.00
Goldmine jewellers london • Ring weight 2.2 • Grams pre owned - Free postage - New and Used
Goldmine jewellers london • Ring weight 2.2 • Grams pre owned - Free postage - New and Used
Gold ring 18ct yellow - 18ct, - £750.00
Central synthetic stone • Classic 18ct yellow • Flanked two sparkling - Free postage - New and Used
Central synthetic stone • Classic 18ct yellow • Flanked two sparkling - Free postage - New and Used
Purple small synthetic - purple, - £3.31
These purple synthetic • Diamonds earrings are • Stunning accessory women - Free postage - New and Used
These purple synthetic • Diamonds earrings are • Stunning accessory women - Free postage - New and Used
Silvery small synthetic - silvery, - £3.31
Earrings are • These silvery synthetic • Perfect women girls - Free postage - New and Used
Earrings are • These silvery synthetic • Perfect women girls - Free postage - New and Used
Gems gemology in review - gemology, - £83.19
Gems gemology review • Synthetic diamonds first • Series books that - Free postage - New and Used
Gems gemology review • Synthetic diamonds first • Series books that - Free postage - New and Used
9ct gold synthetic - gold, - £104.70
9ct gold 1.1g • Synthetic ruby diamond • Setting cw3599f - Free postage - New and Used
9ct gold 1.1g • Synthetic ruby diamond • Setting cw3599f - Free postage - New and Used
Lab grown raw greenish - 3, ct - £14.08
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Coloured rhinestone diamonds - coloured, - £5.40
40mm 50mm material • Synthetic crystal about • After sales products - Free postage - New and Used
40mm 50mm material • Synthetic crystal about • After sales products - Free postage - New and Used
Lab grown ct certified - lab, - £21.84
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Lab grown certified - lab, - £109.20
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Color oval cvd - 4, - £163.89
Certification igl certified • Cvd lab grown • Diamond rough typically - Free postage - New and Used
Certification igl certified • Cvd lab grown • Diamond rough typically - Free postage - New and Used
Lab grown certified - 6, - £34.94
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
80ct lab grown diamond - grown, loose - £400.16
Certification igl certified • Cvd lab grown • Diamond rough typically - Free postage - New and Used
Certification igl certified • Cvd lab grown • Diamond rough typically - Free postage - New and Used
Beaded diamond synthetic - beaded, "diamond" - £4.38
Simple necklace sure • Its clear plastic • Acrylic cut like - Free postage - New and Used
Simple necklace sure • Its clear plastic • Acrylic cut like - Free postage - New and Used
Diamond carat moissanite - 1, - £26.91
925 silver sterling • Elegant 1ct moissanite • Rings women luxury - Free postage - New and Used
925 silver sterling • Elegant 1ct moissanite • Rings women luxury - Free postage - New and Used
2026 are - 25-3-2026, - £4.96
- Free postage - New and Used
- Free postage - New and Used
2025 are - (501), - £2.75
Cover envelope related • Diamond - Free postage - New and Used
Cover envelope related • Diamond - Free postage - New and Used
Opal ring set sterling - opal, - £24.61
Beautiful ring - Free postage - New and Used
Beautiful ring - Free postage - New and Used
Lab grown ct certified - lab, - £10.70
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Igl certified carat - igl, - £152.99
Certification igl certified • Cvd lab grown • Diamond rough typically - Free postage - New and Used
Certification igl certified • Cvd lab grown • Diamond rough typically - Free postage - New and Used
Aaa dark green moissanite - aaa, - £40.38
These gorgeous stones • Are impressive worth • Paying little more - Free postage - New and Used
These gorgeous stones • Are impressive worth • Paying little more - Free postage - New and Used
Pre owned 14ct - pre-owned, - £566.99
1.49mm wide back • Take great care • Ensure our pre - Free postage - New and Used
1.49mm wide back • Take great care • Ensure our pre - Free postage - New and Used
Pretty 18ct yellow gold pink - yellow, gold, - £1199.00
Carat 750 18ct • Diamonds are natural • Pink centre stone - Free postage - New and Used
Carat 750 18ct • Diamonds are natural • Pink centre stone - Free postage - New and Used
Emerald and diamond pendant - emerald, - £250.00
This pendant hallmarked • Dia diamond 375 • 9ct gold birmingham - Free postage - New and Used
This pendant hallmarked • Dia diamond 375 • 9ct gold birmingham - Free postage - New and Used
Gold ring emerald cut - gold, - £195.00
Style stone twist • Shoulders - Free postage - New and Used
Style stone twist • Shoulders - Free postage - New and Used
Ladies round cut synthetic - cut, - £12.94
Check site see • Full range sizes • Colours variety precious - Free postage - New and Used
Check site see • Full range sizes • Colours variety precious - Free postage - New and Used
Bradford exchange bge natural - exchange, - £40.00
Bradford exchange bge • Natural diamond synthetic • Opal memorial ring - Free postage - New and Used
Bradford exchange bge • Natural diamond synthetic • Opal memorial ring - Free postage - New and Used
Lab grown certified - lab, - £24.02
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Lab grown raw - 75, - £545.98
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Try this: synthetic opal | thomas sabo necklace | tiffany bangle | tiffany bean necklace | tiffany charms | tiffany cross necklace | tiffany heart tag | tiffany key ring | tiffany locket | tiffany silver
Shop by budget
Everything you need to know about synthetic diamonds
Whether you are looking for a brand-new or second-hand synthetic diamonds, eBay offers one of the largest selections available online. With 48 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £2.75, while premium listings can reach £1199 — giving you a wide budget spread to work with. The average price of £156.55 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.