Cushion|Lab Grown|IGI

12.15ct F VS1 Cushion Lab Grown Diamond

ID • F/VS1 • IGI LG577377305

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG577377305

Diamond specifications and retailer prices

From £3,035 GBP

$4,073 USD

As of November 1, 2026

Save £14,127 GBP (82%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: £17,162 GBP at Brilliant Earth · As of November 2, 2026

View at Brilliant Earth

About this 12.15ct lab-grown cushion diamond

This 12.15ct lab-grown cushion sits in the over five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG577377305 or 577377305. Listed at 16 retailers as of November 1, 2026, with prices from £3,035 to £17,162, a £14,127 spread on the same certified stone. Brilliant Earth lists it at £17,162. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

12.15

Carat

Colour

VS1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle40.4°

Pavilion angle34.7°

OriginLab Grown

Grading LabIGI

CertificateIGI LG577377305

Dimensions16.36 × 11.70 × 7.73 mm

L/W Ratio1.40

Girdle conditionFaceted

Culet sizePointed

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG577377305

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1

Current: £17,162 GBP|Low: £3,035 GBP|High: £17,691 GBP|Avg: £5,780 GBP|-3.0%

Brilliant Earth

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

Retailer 14

Retailer 15

November 3, 2026

Retailer 6£3,035 GBP

Retailer 15£3,144 GBP

Retailer 8£3,260 GBP

Retailer 5£3,295 GBP

Retailer 9£4,020 GBP

Retailer 2£4,067 GBP

Retailer 14£4,821 GBP

Retailer 4£4,827 GBP

Retailer 3£4,875 GBP

Retailer 10£5,159 GBP

Retailer 7£5,646 GBP

Retailer 12£5,886 GBP

Retailer 11£7,434 GBP

Retailer 13£7,918 GBP

Brilliant Earth£17,162 GBP

30 data points across 15 retailers

16 retailers£3,035 GBP to £17,162 GBP

Cheapest Retailer

£3,035 GBP

$4,073 USD

Final sale: no returns

Retailer 2

£3,144 GBP

$4,219 USD

View

Price last confirmed 21 days ago

Retailer 3

£3,260 GBP

$4,375 USD

View

B+

Retailer 4

£4,020 GBP

$5,395 USD

View

Retailer 5

£4,067 GBP

View

Retailer 6

£4,821 GBP

ZAR 104,511 ZAR

View

Price last confirmed 19 days ago

B+

Retailer 7

£4,827 GBP

View

B+

Retailer 8

£4,875 GBP

$6,542 USD

View

B+

Retailer 9

£5,159 GBP

€6,594 EUR

View

Retailer 10

£5,646 GBP

$7,576 USD

View

Price last confirmed 55 days ago

B+

Retailer 11

£5,886 GBP

A$12,152 AUD

View

B+

Retailer 12

£7,434 GBP

$9,976 USD

View

Retailer 13

£7,918 GBP

A$16,346 AUD

View

Retailer 14

£8,728 GBP

$11,712 USD

View

Retailer 15

£11,090 GBP

$14,882 USD

View

Most Expensive

Brilliant Earth

14103520A · Nov 2

£17,162 GBP

$23,030 USD

View

15 more retailers have this diamond

Prices start from £3,035 GBPSave up to £14,127 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

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