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Heart|Lab Grown|IGI

18.86ct G VS1 Heart Lab Grown Diamond

ID • G/VS1 • IGI LG712589605

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG712589605

Diamond specifications and retailer prices

From £5,153 GBP
As of November 2, 2026
Save £16,309 GBP (76%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £33,507 GBP at With Clarity · As of November 3, 2026
View at With Clarity

About this 18.86ct lab-grown heart diamond

This 18.86ct lab-grown heart sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG712589605 or 712589605. Listed at 16 retailers as of October 31, 2026, with a 317% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

18.86
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle37°
OriginLab Grown
Grading LabIGI
CertificateIGI LG712589605
Dimensions18.72 × 16.43 × 10.41 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.72 mm16.43 mm18.86 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG712589605
Side View
Table 58.0%Crown 37.1°Girdle: MED-STKPavilion 37°Culet: NoneDepth 55.6%

Caratlytics Score

How it works →
A
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 2
Current: £9,963 GBP|Low: £5,153 GBP|High: £33,507 GBP|Avg: £11,901 GBP|+0.3%
Retailer 1
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
Retailer 16
Retailer 17
Retailer 18
With Clarity
November 3, 2026
Retailer 12£5,153 GBP
Retailer 7£5,531 GBP
Retailer 5£5,752 GBP
Retailer 18£6,289 GBP
Retailer 17£6,375 GBP
Retailer 16£6,416 GBP
Retailer 2£6,738 GBP
Retailer 3£7,216 GBP
Retailer 15£7,254 GBP
Retailer 14£7,431 GBP
Retailer 8£7,662 GBP
Retailer 11£7,825 GBP
Retailer 1£9,963 GBP
Retailer 13£12,225 GBP
Retailer 4£16,086 GBP
Retailer 9£16,378 GBP
Retailer 6£21,462 GBP
Retailer 10£24,823 GBP
With Clarity£33,507 GBP

8 data points across 19 retailers

16 retailers£5,153 GBP to £21,462 GBP

A
Cheapest Retailer
-
£5,153 GBP
A
Retailer 2
-
£5,531 GBP
$7,418 USD
View
A
Retailer 3
-
£5,752 GBP
$7,714 USD
View
A
Retailer 4
-
£6,289 GBP
$8,434 USD
View
A
Retailer 5
-
£6,375 GBP
$8,550 USD
View
A
Retailer 6
-
£6,416 GBP
$8,605 USD
View
A
Retailer 7
-
£6,738 GBP
HK$70,600 HKD
View
B+
Retailer 8
-
£7,216 GBP
$9,677 USD
View
B+
Retailer 9
-
£7,254 GBP
$9,728 USD
View
B+
Retailer 10
-
£7,431 GBP
$9,965 USD
View
B+
Retailer 11
-
£7,825 GBP
View
B+
Retailer 12
-
£9,963 GBP
ZAR 215,845 ZAR
View
B
Retailer 13
-
£12,225 GBP
A$25,222 AUD
View
B
Retailer 14
-
£16,086 GBP
$21,573 USD
View
B
Retailer 15
-
£21,462 GBP
$28,782 USD
View
Most Expensive
With Clarity
712589605 · Nov 3
£33,507 GBP
$44,936 USD
View
Price under review
15 more retailers have this diamond
Prices start from £5,153 GBPSave up to £16,309 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.

A
18.86ct Heart
£5,153 GBP