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Heart|Lab Grown|IGI

1.23ct D VS1 Heart Lab Grown Diamond

EX • D/VS1 • IGI LG791637215

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG791637215

Diamond specifications and retailer prices

From £143 GBP
As of November 4, 2026
Save £725 GBP (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £868 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.23ct lab-grown heart diamond

This 1.23ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG791637215 or 791637215. Listed at 19 retailers as of November 4, 2026, with prices from £143 to £868, a £725 spread on the same certified stone. Reve Diamonds lists it at £868. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG791637215
Dimensions7.13 × 7.12 × 4.30 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.13 mm7.12 mm1.23 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG791637215
Side View
Table 58.0%Crown 35.3°Girdle: MED-THKPavilion 39.8°Culet: NoneDepth 60.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £320 GBP|Low: £143 GBP|High: £1,030 GBP|Avg: £435 GBP|-17.7%
Retailer 1
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Retailer 19
Reve Diamonds
November 5, 2026
Retailer 14£143 GBP
Retailer 17£160 GBP
Retailer 3£166 GBP
Retailer 7£181 GBP
Retailer 8£181 GBP
Retailer 13£236 GBP
Retailer 2£310 GBP
Retailer 5£312 GBP
Retailer 6£316 GBP
Retailer 1£320 GBP
Retailer 9£354 GBP
Retailer 10£419 GBP
Retailer 16£441 GBP
Retailer 4£441 GBP
Retailer 15£570 GBP
Retailer 19£573 GBP
Retailer 18£610 GBP
Retailer 12£827 GBP
Reve Diamonds£868 GBP
Retailer 11£1,030 GBP

29 data points across 20 retailers

19 retailers£143 GBP to £868 GBP

A
Cheapest Retailer
-
£143 GBP
A
Retailer 2
-
£160 GBP
View
Final sale: no returns
A
Retailer 3
-
£166 GBP
View
A
Retailer 4
-
£181 GBP
View
Retailer 5
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£181 GBP
View
Price last confirmed 11 days ago
A
Retailer 6
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£236 GBP
View
A
Retailer 7
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£310 GBP
View
A
Retailer 8
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£312 GBP
View
A
Retailer 9
-
£316 GBP
View
A
Retailer 10
-
£320 GBP
View
B+
Retailer 11
-
£354 GBP
View
B+
Retailer 12
-
£419 GBP
View
B+
Retailer 13
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£441 GBP
View
B+
Retailer 14
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£441 GBP
View
B
Retailer 15
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£570 GBP
View
B
Retailer 16
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£573 GBP
View
B
Retailer 17
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£610 GBP
View
B
Retailer 18
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£827 GBP
View
Most Expensive
B
Reve Diamonds
0D06138E5 · Nov 4
£868 GBP
$1,172 USD
View
18 more retailers have this diamond
Prices start from £143 GBPSave up to £725 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
1.23ct Heart
£143 GBP