Synthetic diamonds
Synthetic diamonds for sale on Ireland's largest auction and classifieds sites
Budget picks — under £18
Ring adopts composite • Process etching stamping • Tolerance 0.03mm zircon - Free postage - New and Used
8mm - Free postage - New and Used
Main five carat • High carbon diamond • Using multi faceted - Free postage - New and Used
Main ring equipped • Gradient zircon upper • Layer consists miniature - Free postage - New and Used
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Eimass hotfix rhinestones • Gembond clear glue • Non hot fix - Free postage - New and Used
Browse 48 synthetic diamonds listings currently in our index. Prices range from £3.55 to £338.2, with an average of £60.29. 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 →
Full diamond design • Features premium cluster • Zirconia stones sparkling - Free postage - New and Used
Main five carat • High carbon diamond • Using multi faceted - Free postage - New and Used
This white gold • Plated aaa quality • Carat lab created - Free postage - New and Used
Als andere sites • Goedkopere producten vinden • Die het eerste - Free postage - New and Used
Ring treated triple • Electroplating total coating • Thickness which automatically - Free postage - New and Used
Beautiful sterling silver • Ring stamped 925 - Free postage - New and Used
Ring treated triple • Electroplating total coating • Thickness which automatically - Free postage - New and Used
This classic gold • Filled ring features • Cluster sparkling white - Free postage - New and Used
Bought gift but • Dont like emerald • These are gold - Free postage - New and Used
You check other • May find cheaper • Products that first - Free postage - New and Used
9ct gold plated • Sterling silver dress • Ring set wrap - Free postage - New and Used
Mid-range — £20 to £59
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
Certification igl certified • Cvd lab grown • Diamond rough typically - Free postage - New and Used
Beautiful ring - Free postage - New and Used
Certification igl certified • Cvd lab grown • Diamond rough typically - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
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
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
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
Authentic glencara irish • Jewelry 18k gold • Plated 925k silver - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Item will shipped • Within day after • Payment cleared delivery - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Premium — over £62
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
Item will shipped • Within day after • Payment cleared delivery - Free postage - New and Used
9ct yellow gold • These twinkling stud • Earrings feature trio - Free postage - New and Used
Certification igl certified • Cvd lab grown • Diamond rough typically - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
375 gold hallmarked • Ring valued midas • Touch jewellers who - Free postage - New and Used
925 silver carat • Moissanite ring european • American retro niche - Free postage - New and Used
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
9ct gold pear • Shaped pearl diamond • Pendant set imitation - Free postage - New and Used
1.15 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
Cvd lab grown • Diamond rough typically • Seed substrate gases - Free postage - New and Used
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
Yellow gold 0.25ct • Natural diamond sapphire • Then followed dazzling - Free postage - New and Used
Set hallmarked yellow • Gold 10k fabulous • Ruby diamond ring - Free postage - New and Used
Try this: synthetic opal | thomas sabo necklace | tiffany bangle | tiffany wedding rings | tolkowsky engagement rings | yellow sapphire ring | garnet earrings | tourmaline ring | willis gambier creole | tiffany heart link bracelet
🔥 Best eBay deals on synthetic diamonds
See all listings on eBay →These 48 listings for synthetic diamonds are the lowest-priced items currently in our index. Prices are sorted ascending so you can quickly gauge the market before going further.
Adjustable Zircon Ring Perfect
Ring adopts composite • Process etching stamping • Tolerance 0.03mm zircon
£4
Costume Jewellery - Large
8mm
£4
5CT High Carbon Diamond Ring
Main five carat • High carbon diamond • Using multi faceted
£4
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 £3.55, while premium listings can reach £338.2 — giving you a wide budget spread to work with. The average price of £60.29 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.