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Round|Lab Grown|IGI

2.51ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG818688390

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818688390

Diamond specifications and retailer prices

From $2,680 USD
As of October 29, 2026
Save $8,158 USD (75%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $10,838 USD at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 2.51ct lab-grown round diamond

This 2.51ct lab-grown round sits in the two to three carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818688390 or 818688390. Listed at 17 retailers as of October 29, 2026, with prices from $2,680 to $10,838, a $8,158 spread on the same certified stone. Taylor and Hart lists it at $10,838. 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
E
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818688390
Dimensions8.74 × 8.69 × 5.37 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.74 mm8.69 mm2.51 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818688390
Side View
Table 58.0%Crown 34.3°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $4,182 USD|Low: $2,142 USD|High: $10,838 USD|Avg: $5,607 USD|+2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Taylor and Hart
October 30, 2026
Retailer 10$3,000 USD
Retailer 9$3,109 USD
Retailer 2$3,177 USD
Retailer 1$4,182 USD
Retailer 5$4,440 USD
Retailer 6$4,561 USD
Retailer 8$4,839 USD
Retailer 7$7,809 USD
Retailer 3$8,021 USD
Retailer 4$8,368 USD
Taylor and Hart$10,838 USD

39 data points across 11 retailers

17 retailers$2,680 USD to $10,838 USD

B+
Cheapest Retailer
-
$2,680 USD
Retailer 2
-
$2,680 USD
View
Price last confirmed 35 days ago
Retailer 3
-
$2,916 USD
View
Price last confirmed 37 days ago
B+
Retailer 4
-
$3,000 USD
View
Final sale: no returns
Retailer 5
-
$3,066 USD
View
Price last confirmed 33 days ago
Retailer 6
-
$3,066 USD
View
Price last confirmed 34 days ago
Retailer 7
-
$3,109 USD
View
Price last confirmed 18 days ago
B+
Retailer 8
-
$3,177 USD
View
B+
Retailer 9
-
$4,182 USD
£3,293 GBP
View
B+
Retailer 10
-
$4,273 USD
View
B+
Retailer 11
-
$4,440 USD
View
B+
Retailer 12
-
$4,561 USD
View
B
Retailer 13
-
$4,839 USD
View
B
Retailer 14
-
$7,809 USD
View
B
Retailer 15
-
$8,021 USD
ZAR 129,573 ZAR
View
B
Retailer 16
-
$8,368 USD
£6,589 GBP
View
Most Expensive
B
Taylor and Hart
RD6C9YJ · Oct 30
$10,838 USD
View
16 more retailers have this diamond
Prices start from $2,680 USDSave up to $8,158 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.

B+
2.51ct Round
$2,680 USD