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Heart|Lab Grown|IGI

1.29ct D VVS1 Heart Lab Grown Diamond

ID • D/VVS1 • IGI LG817624281

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG817624281

Diamond specifications and retailer prices

From £158 GBP
As of November 4, 2026
Save £627 GBP (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,126 GBP at Brilliant Earth · As of October 16, 2026
View at Brilliant Earth

About this 1.29ct lab-grown heart diamond

This 1.29ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG817624281 or 817624281. Listed at 10 retailers as of November 2, 2026, with a 397% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.29
Carat
D
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle38.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817624281
Dimensions7.43 × 6.55 × 4.43 mm
L/W Ratio1.13
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.43 mm6.55 mm1.29 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817624281
Side View
Table 60.0%Crown 35.4°Girdle: MED-STKPavilion 38.5°Culet: NoneDepth 59.6%

Caratlytics Score

How it works →
A+
Exceptional
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 4
Current: £1,126 GBP|Low: £158 GBP|High: £1,163 GBP|Avg: £536 GBP|-3.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 4, 2026
Retailer 9£158 GBP
Retailer 7£183 GBP
Retailer 6£336 GBP
Retailer 5£378 GBP
Retailer 4£479 GBP
Retailer 8£629 GBP
Retailer 2£631 GBP
Retailer 3£784 GBP
Brilliant Earth£1,126 GBP

28 data points across 9 retailers

10 retailers£158 GBP to £784 GBP

A+
Cheapest Retailer
-
£158 GBP
A
Retailer 2
-
£183 GBP
View
A
Retailer 3
-
£336 GBP
View
A
Retailer 4
-
£378 GBP
View
B+
Retailer 5
-
£479 GBP
View
B+
Retailer 6
-
£528 GBP
View
B+
Retailer 7
-
£629 GBP
View
B+
Retailer 8
-
£631 GBP
View
B+
Retailer 9
-
£784 GBP
View
Most Expensive
Brilliant Earth
20729582A · Oct 16
£1,126 GBP
$1,520 USD
View
Price last confirmed 19 days ago
9 more retailers have this diamond
Prices start from £158 GBPSave up to £627 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+
1.29ct Heart
£158 GBP