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Heart|Lab Grown|IGI

3.51ct D IF Heart Lab Grown Diamond

ID • D/IF • IGI LG627400559

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG627400559

Diamond specifications and retailer prices

From $2,571 USD
As of October 30, 2026
Save $7,831 USD (75%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $10,402 USD at Taylor and Hart · As of October 30, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG627400559 or 627400559. Listed at 16 retailers as of October 30, 2026, with prices from $2,571 to $10,402, a $7,831 spread on the same certified stone. Taylor and Hart lists it at $10,402. 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
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.3°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG627400559
Dimensions9.04 × 10.52 × 6.37 mm
L/W Ratio1.16
Girdle conditionFaceted
Culet sizePointed
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
9.04 mm10.52 mm3.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG627400559
Side View
Table 58.0%Crown 39.3°Girdle: MED-STKPavilion 38.8°Culet: NoneDepth 60.6%

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: Oct 30
Current: $4,027 USD|Low: $2,468 USD|High: $8,605 USD|Avg: $4,497 USD|-0.2%
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
October 31, 2026
Retailer 10$2,571 USD
Retailer 3$2,797 USD
Retailer 5$2,878 USD
Retailer 11$2,982 USD
Retailer 4$3,104 USD
Retailer 9$3,145 USD
Retailer 1$4,027 USD
Retailer 2$4,099 USD
Retailer 8$4,376 USD
Retailer 13$4,646 USD
Retailer 6$6,925 USD
Retailer 12$7,962 USD
Retailer 7$7,995 USD

43 data points across 13 retailers

16 retailers$2,571 USD to $10,402 USD

A
Cheapest Retailer
-
$2,571 USD
A
Retailer 2
-
$2,797 USD
View
A
Retailer 3
-
$2,878 USD
View
Final sale: no returns
A
Retailer 4
-
$2,982 USD
View
Retailer 5
-
$2,982 USD
View
Price last confirmed 19 days ago
A
Retailer 6
-
$3,104 USD
View
A
Retailer 7
-
$3,145 USD
View
A
Retailer 8
-
$4,027 USD
£3,171 GBP
View
A
Retailer 9
-
$4,099 USD
View
A
Retailer 10
-
$4,111 USD
View
B+
Retailer 11
-
$4,376 USD
View
B+
Retailer 12
-
$4,646 USD
View
B+
Retailer 13
-
$6,925 USD
ZAR 111,872 ZAR
View
B+
Retailer 14
-
$7,962 USD
View
B+
Retailer 15
-
$7,995 USD
£6,295 GBP
View
Most Expensive
B
Taylor and Hart
3KFINA1 · Oct 30
$10,402 USD
View
15 more retailers have this diamond
Prices start from $2,571 USDSave up to $7,831 USD

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
$2,571 USD