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Heart|Lab Grown|IGI

2.51ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG818659727

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818659727

Diamond specifications and retailer prices

From $1,278 USD
As of October 30, 2026
Save $5,362 USD (81%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $6,640 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 2.51ct lab-grown heart diamond

This 2.51ct lab-grown heart sits in the two to three carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818659727 or 818659727. Listed at 19 retailers as of October 30, 2026, with prices from $1,278 to $6,640, a $5,362 spread on the same certified stone. Brilliant Earth lists it at $6,640. 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

2.51
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818659727
Dimensions9.15 × 8.49 × 5.47 mm
L/W Ratio1.08
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
9.15 mm8.49 mm2.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818659727
Side View
Table 58.0%Crown 36.4°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 59.8%

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: $6,640 USD|Low: $1,278 USD|High: $9,530 USD|Avg: $4,536 USD|-30.3%
Brilliant Earth
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
October 30, 2026
Retailer 5$1,278 USD
Retailer 18$1,391 USD
Retailer 10$1,447 USD
Retailer 15$1,483 USD
Retailer 14$1,655 USD
Retailer 2$2,089 USD
Retailer 7$2,348 USD
Retailer 12$2,444 USD
Retailer 8$2,591 USD
Retailer 17$2,624 USD
Retailer 16$2,779 USD
Retailer 11$3,825 USD
Retailer 6$4,070 USD
Retailer 13$4,789 USD
Retailer 9$5,095 USD
Retailer 3$5,204 USD
Retailer 4$5,529 USD
Brilliant Earth$6,640 USD

30 data points across 18 retailers

19 retailers$1,278 USD to $6,640 USD

A
Cheapest Retailer
-
$1,278 USD
A
Retailer 2
-
$1,391 USD
View
A
Retailer 3
-
$1,447 USD
View
Final sale: no returns
A
Retailer 4
-
$1,483 USD
View
A
Retailer 5
-
$1,655 USD
View
A
Retailer 6
-
$2,089 USD
£1,645 GBP
View
Retailer 7
-
$2,111 USD
View
Price last confirmed 18 days ago
A
Retailer 8
-
$2,348 USD
View
A
Retailer 9
-
$2,444 USD
€2,328 EUR
View
A
Retailer 10
-
$2,591 USD
View
A
Retailer 11
-
$2,624 USD
View
B+
Retailer 12
-
$2,779 USD
View
B+
Retailer 13
-
$3,825 USD
ZAR 61,798 ZAR
View
B+
Retailer 14
-
$4,070 USD
View
B+
Retailer 15
-
$4,789 USD
£3,771 GBP
View
B
Retailer 16
-
$5,095 USD
SGD 6,885 SGD
View
B
Retailer 17
-
$5,204 USD
View
B+
Retailer 18
-
$5,529 USD
View
Most Expensive
B
Brilliant Earth
21421377A · Oct 30
$6,640 USD
View
18 more retailers have this diamond
Prices start from $1,278 USDSave up to $5,362 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
2.51ct Heart
$1,278 USD