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Round|Lab Grown|IGI

2.51ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG485136720

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485136720

Diamond specifications and retailer prices

From $2,187 USD
As of November 5, 2026
Save $4,679 USD (68%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,866 USD at MOH London · As of November 5, 2026
View at MOH London

About this 2.51ct lab-grown round diamond

This 2.51ct lab-grown round sits in the two to three carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG485136720 or 485136720. Listed at 10 retailers as of November 5, 2026, with prices from $2,187 to $6,866, a $4,679 spread on the same certified stone. MOH London lists it at $6,866. 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
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485136720
Dimensions8.87 × 8.90 × 5.20 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.87 mm8.90 mm2.51 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485136720
Side View
Table 59.0%Crown 31.9°GirdlePavilion 40.2°Culet: NoneDepth 58.6%

Caratlytics Score

How it works →
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: Nov 5
Current: $6,866 USD|Low: $2,100 USD|High: $9,080 USD|Avg: $4,069 USD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 5$2,187 USD
Retailer 2$2,460 USD
Retailer 6$2,537 USD
Retailer 8$2,537 USD
Retailer 4$2,700 USD
Retailer 9$3,242 USD
Retailer 7$3,964 USD
Retailer 3$3,977 USD
MOH London$6,866 USD
Retailer 10$9,080 USD

38 data points across 10 retailers

10 retailers$2,187 USD to $6,866 USD

A
Cheapest Retailer
-
$2,187 USD
A
Retailer 2
-
$2,380 USD
View
A
Retailer 3
-
$2,460 USD
View
B+
Retailer 4
-
$2,537 USD
View
Retailer 5
-
$2,537 USD
View
Price last confirmed 26 days ago
B+
Retailer 6
-
$2,700 USD
View
B
Retailer 7
-
$3,488 USD
View
B
Retailer 8
-
$3,964 USD
View
B
Retailer 9
-
$3,977 USD
View
Most Expensive
B
MOH London
LG485136720 · Nov 5
$6,866 USD
£5,406 GBP
View
9 more retailers have this diamond
Prices start from $2,187 USDSave up to $4,679 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
$2,187 USD