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Synthetic diamonds

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Synthetic diamonds for sale on Ireland's largest auction and classifieds sites

Home / Fine Jewellery / Synthetic diamonds refurbished & used for sale | For Sale UK
Unfoiled zircon stones - zircon,

Unfoiled zircon stones - zircon,

£4.99 · Buy It Now

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Synthetic diamond - 1.15, ct--

Synthetic diamond - 1.15, ct--

£94.30 · Buy It Now

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Aaa dark green - green, moissanite

Aaa dark green - green, moissanite

£37.06 · Buy It Now

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Aaa dark green moissanite - green,

Aaa dark green moissanite - green,

£38.35 · Buy It Now

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Moissanite vvs1 round cut - round,

Moissanite vvs1 round cut - round,

£44.88 · Buy It Now

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Moissanite round cut - round,

Moissanite round cut - round,

£57.71 · Buy It Now

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Synthetic diamond - ct--,

Synthetic diamond - ct--,

£109.90 · Buy It Now

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Aaa white color - aaa, cut

Aaa white color - aaa, cut

£41.69 · Buy It Now

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Carat synthetic diamonds - 1,

Carat synthetic diamonds - 1,

£6.45 · Buy It Now

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Moissanite round cut loose - moissanite,

Moissanite round cut loose - moissanite,

£35.28 · Buy It Now

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Moissanite vvs1 round cut - vvs1,

Moissanite vvs1 round cut - vvs1,

£25.43 · Buy It Now

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Gold 25ct natural - natural, diamond

Gold 25ct natural - natural, diamond

£299.00 · Buy It Now

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Gram synthetic diamonds - synthetic,

Gram synthetic diamonds - synthetic,

£18.32 · Buy It Now

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Lab grown diamond - 40,

Lab grown diamond - 40,

£400.27 · Buy It Now

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Aaa dark green - aaa, moissanite

Aaa dark green - aaa, moissanite

£40.25 · Buy It Now

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Igl certified loose - certified,

Igl certified loose - certified,

£111.39 · Buy It Now

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White color vvs1 moissanite - vvs1,

White color vvs1 moissanite - vvs1,

£41.86 · Buy It Now

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Pretty 18ct yellow gold - 18ct, gold,

Pretty 18ct yellow gold - 18ct, gold,

£995.00 · Buy It Now

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Opal ring set sterling - ring,

Opal ring set sterling - ring,

£24.61 · Buy It Now

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Gold ring 18ct - ring,

Gold ring 18ct - ring,

£750.00 · Buy It Now

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Lab rough synthetic white - synthetic,

Lab rough synthetic white - synthetic,

£21.87 · Buy It Now

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Lab grown certified - 35.50,

Lab grown certified - 35.50,

£163.75 · Buy It Now

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9ct gold oval - oval, synthetic

9ct gold oval - oval, synthetic

£425.00 · Buy It Now

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Vintage michelle albala 925 - vintage, albala"

Vintage michelle albala 925 - vintage, albala"

£19.36 · Buy It Now

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White color round - white, d

White color round - white, d

£83.70 · Buy It Now

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Synthetic emerald and diamond - synthetic,

Synthetic emerald and diamond - synthetic,

£300.00 · Buy It Now

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Starburst gold earrings - gold,

Starburst gold earrings - gold,

£67.33 · Buy It Now

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Lab grown ct - lab,

Lab grown ct - lab,

£20.96 · Buy It Now

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Lab grown certified - 6,

Lab grown certified - 6,

£35.65 · Buy It Now

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Lab grown cvd diamond f - 50,

Lab grown cvd diamond f - 50,

£290.82 · Buy It Now

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9ct gold ring with synthetic

9ct gold ring with synthetic

£135.90 · Buy It Now

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Luxury butterfly brooch - luxury, 14k

Luxury butterfly brooch - luxury, 14k

£16.15 · Buy It Now

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Purple small synthetic - small,

Purple small synthetic - small,

£3.31 · Buy It Now

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Vintage art deco two tone - vintage,

Vintage art deco two tone - vintage,

£346.04 · Buy It Now

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White color round - d, cut

White color round - d, cut

£83.21 · Buy It Now

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White color round - white, cut

White color round - white, cut

£83.70 · Buy It Now

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Lab grown certified - ct,

Lab grown certified - ct,

£52.59 · Buy It Now

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Synthetic diamonds gems - diamonds,

Synthetic diamonds gems - diamonds,

£70.55 · Buy It Now

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80cts lab created - 3.80cts, synthetic

80cts lab created - 3.80cts, synthetic

£62.23 · Buy It Now

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Lab grown cvd diamond - 15,

Lab grown cvd diamond - 15,

£111.39 · Buy It Now

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Stone set flower - shiny, 925

Stone set flower - shiny, 925

£18.82 · Buy It Now

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9x9 white color loose - d,

9x9 white color loose - d,

£108.80 · Buy It Now

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Raw lab grown - 5, ct

Raw lab grown - 5, ct

£20.09 · Buy It Now

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White color round - white, d

White color round - white, d

£109.45 · Buy It Now

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Sparking synthetic diamond - sparking,

Sparking synthetic diamond - sparking,

£2.51 · Buy It Now

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9ct gold synthetic - (1.1g), ruby

9ct gold synthetic - (1.1g), ruby

£104.70 · Buy It Now

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Igl certified loose green - igl,

Igl certified loose green - igl,

£40.10 · Buy It Now

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Synthetic sparkling diamond - synthetic,

Synthetic sparkling diamond - synthetic,

£23.57 · Buy It Now

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5ct high carbon diamond - high, ring

5ct high carbon diamond - high, ring

£6.98 · Buy It Now

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Presidium synthetic diamond - presidium,

Presidium synthetic diamond - presidium,

£888.29 · Buy It Now

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Beaded diamond synthetic - beaded, "diamond"

Beaded diamond synthetic - beaded, "diamond"

£4.38 · Buy It Now

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Diamond carat moissanite - 1,

Diamond carat moissanite - 1,

£26.91 · Buy It Now

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Certified cvd diamond lab - diamond, 3

Certified cvd diamond lab - diamond, 3

£18.34 · Buy It Now

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White color vvs1 moissanite - white, d

White color vvs1 moissanite - white, d

£41.86 · Buy It Now

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Box 12 diamond - 2,

Box 12 diamond - 2,

£12.94 · Buy It Now

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Single lab created - created, aaa

Single lab created - created, aaa

£5.99 · Buy It Now

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Lab grown ct - grown, certified

Lab grown ct - grown, certified

£26.38 · Buy It Now

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9ct 375 white - 375,

9ct 375 white - 375,

£335.00 · Buy It Now

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Lab grown greenish - lab, ct

Lab grown greenish - lab, ct

£18.77 · Buy It Now

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9ct gold hallmarked - hallmarked, &

9ct gold hallmarked - hallmarked, &

£219.00 · Buy It Now

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900 platinum natural - pt,

900 platinum natural - pt,

£394.30 · Buy It Now

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9ct gold oval cut - gold,

9ct gold oval cut - gold,

£475.00 · Buy It Now

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Gold ring emerald - ring,

Gold ring emerald - ring,

£195.00 · Buy It Now

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Ladies round cut - round,

Ladies round cut - round,

£12.94 · Buy It Now

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Baguette cut synthetic diamond - baguette,

Baguette cut synthetic diamond - baguette,

£17.21 · Buy It Now

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Carat high carbon diamond - carat,

Carat high carbon diamond - carat,

£5.10 · Buy It Now

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Synthetic ruby and diamond - synthetic,

Synthetic ruby and diamond - synthetic,

£250.00 · Buy It Now

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Igl carat raw lab grown - carat,

Igl carat raw lab grown - carat,

£35.65 · Buy It Now

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9ct gold ring solitaire - 9ct,

9ct gold ring solitaire - 9ct,

£288.00 · Buy It Now

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Synthetic blue sapphire - blue,

Synthetic blue sapphire - blue,

£8.12 · Buy It Now

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5ct high carbon - high, ring

5ct high carbon - high, ring

£6.98 · Buy It Now

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Exceptional 18ct yellow - exceptional, gold

Exceptional 18ct yellow - exceptional, gold

£1295.00 · Buy It Now

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18ct gold modern - , synthetic

18ct gold modern - , synthetic

£1536.70 · Buy It Now

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Lab grown color vvs1 - 6, f-color

Lab grown color vvs1 - 6, f-color

£24.02 · Buy It Now

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Lab grown certified - ct,

Lab grown certified - ct,

£363.52 · Buy It Now

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Emerald and diamond - emerald,

Emerald and diamond - emerald,

£250.00 · Buy It Now

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Lab grown diamond - grown, ct

Lab grown diamond - grown, ct

£109.60 · Buy It Now

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Vintage synthetic diamond - vintage,

Vintage synthetic diamond - vintage,

£14.99 · Buy It Now

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Diamond dress ring synthetic - dress,

Diamond dress ring synthetic - dress,

£125.22 · Buy It Now

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9ct gold princess - 9ct,

9ct gold princess - 9ct,

£825.00 · Buy It Now

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Geneva watch large - watch, multi

Geneva watch large - watch, multi

£19.59 · Buy It Now

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9ct white gold fine curb - curb, chain

9ct white gold fine curb - curb, chain

£301.99 · Buy It Now

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Synthetic diamond pendant - pendant, &

Synthetic diamond pendant - pendant, &

£5.77 · Buy It Now

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Gold pendant 9ct - pendant,

Gold pendant 9ct - pendant,

£165.00 · Buy It Now

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Synthetics yellow diamonds - synthetics,,

Synthetics yellow diamonds - synthetics,,

£48.29 · Buy It Now

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Pink and clear - pink,

Pink and clear - pink,

£13.47 · Buy It Now

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Lab grown certified - certified, 3.1

Lab grown certified - certified, 3.1

£17.82 · Buy It Now

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Chic silvery hollowed diamond - silvery,

Chic silvery hollowed diamond - silvery,

£6.42 · Buy It Now

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Glencarra cladagh pendant - ,,

Glencarra cladagh pendant - ,,

£26.69 · Buy It Now

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9ct yellow gold oval cut - gold,

9ct yellow gold oval cut - gold,

£400.00 · Buy It Now

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9ct yellow gold - yellow,

9ct yellow gold - yellow,

£265.00 · Buy It Now

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Art deco synthetic ruby and - synthetic,

Art deco synthetic ruby and - synthetic,

£1045.00 · Buy It Now

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London diamond centre visit - london,

London diamond centre visit - london,

£10.00 · Buy It Now

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Lab grown f color - grown, f-color

Lab grown f color - grown, f-color

£22.28 · Buy It Now

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Certified colorless - certified,

Certified colorless - certified,

£66.39 · Buy It Now

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Lab grown certified - lab,

Lab grown certified - lab,

£53.59 · Buy It Now

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📊96 listings · from £2.51 · avg £169.82
⚠️ These listings were last updated more than 16 days ago. Search for fresh listings

Browse 96 synthetic diamonds listings currently in our index. Prices range from £2.51 to £1536.7, with an average of £169.82. 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 →

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

< £25 £25 – £50 £50 – £100 £100 – £200 £200 – £500 > £500

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 96 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 £2.51, while premium listings can reach £1536.7 — giving you a wide budget spread to work with. The average price of £169.82 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.

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