CaratHunter
Plans
Round|Lab Grown|IGI

2.51ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG823631515

Shape and cutting style on the report: Round brilliant

Certificate IGI LG823631515

Diamond specifications and retailer prices

From $280 USD
As of November 1, 2026
Save $1,215 USD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,495 USD at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 2.51ct lab-grown round diamond

This 2.51ct lab-grown round sits in the two to three carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG823631515 or 823631515. Listed at 11 retailers as of November 1, 2026, with prices from $280 to $1,495, a $1,215 spread on the same certified stone. Rare Carat lists it at $1,495. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.51
Carat
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823631515
Dimensions8.85 × 8.81 × 5.25 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.85 mm8.81 mm2.51 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823631515
Side View
Table 61.0%Crown 32°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 59.5%

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 1
Current: $1,495 USD|Low: $275 USD|High: $1,619 USD|Avg: $1,008 USD|-7.7%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 6$280 USD
Retailer 4$567 USD
Retailer 8$572 USD
Retailer 3$1,065 USD
Retailer 5$1,065 USD
Retailer 7$1,115 USD
Retailer 9$1,378 USD
Retailer 2$1,389 USD
Rare Carat$1,495 USD

28 data points across 9 retailers

11 retailers$280 USD to $1,495 USD

Retailer 1
-
$280 USD
Price last confirmed 41 days ago
A
Retailer 2
-
$280 USD
View
A
Retailer 3
-
$567 USD
€540 EUR
View
Retailer 4
-
$572 USD
£451 GBP
View
Price last confirmed 16 days ago
B
Retailer 5
-
$1,065 USD
View
B
Retailer 6
-
$1,065 USD
View
B+
Retailer 7
-
$1,115 USD
View
Retailer 8
-
$1,139 USD
View
Price last confirmed 42 days ago
Retailer 9
-
$1,378 USD
SGD 1,862 SGD
View
Price last confirmed 20 days ago
B
Retailer 10
-
$1,389 USD
£1,094 GBP
View
Most Expensive
B
Rare Carat
LGRD20-122494 · Nov 1
$1,495 USD
View
10 more retailers have this diamond
Prices start from $280 USDSave up to $1,215 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 Round
$280 USD