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Heart|Lab Grown|IGI

3.51ct D VVS1 Heart Lab Grown Diamond

ID • D/VVS1 • IGI LG778675137

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG778675137

Diamond specifications and retailer prices

From £1,309 GBP
$1,756 USD
As of November 2, 2026
Save £2,388 GBP (65%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,697 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 3.51ct lab-grown heart diamond

This 3.51ct lab-grown heart sits in the three to five carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG778675137 or 778675137. Listed at 6 retailers as of October 31, 2026, with prices from £1,309 to £3,697, a £2,388 spread on the same certified stone. Taylor and Hart lists it at £3,697. 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

3.51
Carat
D
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle37.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778675137
Dimensions9.33 × 10.64 × 5.97 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
9.33 mm10.64 mm3.51 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778675137
Side View
Table 59.0%Crown 38°Girdle: STK-THKPavilion 37.2°Culet: NoneDepth 56.1%

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: £1,509 GBP|Low: £1,270 GBP|High: £3,766 GBP|Avg: £2,257 GBP|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Taylor and Hart
November 3, 2026
Retailer 3£1,309 GBP
Retailer 1£1,509 GBP
Retailer 5£1,672 GBP
Retailer 4£1,970 GBP
Retailer 2£3,373 GBP
Taylor and Hart£3,697 GBP

43 data points across 6 retailers

6 retailers£1,309 GBP to £3,697 GBP

A
Cheapest Retailer
-
£1,309 GBP
$1,756 USD
B+
Retailer 2
-
£1,509 GBP
View
B+
Retailer 3
-
£1,672 GBP
$2,244 USD
View
B+
Retailer 4
-
£1,970 GBP
$2,644 USD
View
B
Retailer 5
-
£3,373 GBP
View
Most Expensive
B
Taylor and Hart
HGHQXFF · Oct 31
£3,697 GBP
$4,961 USD
View
5 more retailers have this diamond
Prices start from £1,309 GBPSave up to £2,388 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
3.51ct Heart
£1,309 GBP