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Round|Lab Grown|IGI

2.55ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG818675188

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818675188

Diamond specifications and retailer prices

From $313 USD
As of November 1, 2026
Save $1,241 USD (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,554 USD at MOH London · As of November 1, 2026
View at MOH London

About this 2.55ct lab-grown round diamond

This 2.55ct lab-grown round sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818675188 or 818675188. Listed at 16 retailers as of November 1, 2026, with prices from $313 to $1,554, a $1,241 spread on the same certified stone. MOH London lists it at $1,554. 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

2.55
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818675188
Dimensions8.81 × 8.74 × 5.37 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.81 mm8.74 mm2.55 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818675188
Side View
Table 59.0%Crown 34.6°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.2%

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 1
Current: $1,554 USD|Low: $300 USD|High: $1,574 USD|Avg: $650 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6$313 USD
Retailer 10$350 USD
Retailer 7$388 USD
Retailer 9$388 USD
Retailer 2$561 USD
Retailer 8$631 USD
Retailer 4$635 USD
Retailer 3$689 USD
Retailer 5$1,138 USD
MOH London$1,554 USD

42 data points across 10 retailers

16 retailers$313 USD to $1,554 USD

Retailer 1
-
$313 USD
Price last confirmed 37 days ago
A
Retailer 2
-
$313 USD
View
A
Retailer 3
-
$350 USD
View
Final sale: no returns
Retailer 4
-
$363 USD
View
Price last confirmed 39 days ago
Retailer 5
-
$383 USD
View
Price last confirmed 37 days ago
A
Retailer 6
-
$388 USD
View
Retailer 7
-
$388 USD
View
Price last confirmed 7 days ago
A
Retailer 8
-
$561 USD
£442 GBP
View
B+
Retailer 9
-
$631 USD
View
A
Retailer 10
-
$635 USD
View
A
Retailer 11
-
$689 USD
£543 GBP
View
B+
Retailer 12
-
$1,003 USD
View
B+
Retailer 13
-
$1,138 USD
View
B
Retailer 14
-
$1,247 USD
View
B+
Retailer 15
-
$1,293 USD
View
Most Expensive
B
MOH London
LG818675188 · Nov 1
$1,554 USD
£1,224 GBP
View
15 more retailers have this diamond
Prices start from $313 USDSave up to $1,241 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
2.55ct Round
$313 USD