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Round|Lab Grown|IGI

2.55ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG783653666

Shape and cutting style on the report: Round brilliant

Certificate IGI LG783653666

Diamond specifications and retailer prices

From $336 USD
As of November 1, 2026
Save $1,554 USD (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,890 USD at Brilliant Earth · As of November 1, 2026
View at Brilliant Earth

About this 2.55ct lab-grown round diamond

This 2.55ct lab-grown round sits in the two to three carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG783653666 or 783653666. Listed at 16 retailers as of November 1, 2026, with prices from $336 to $1,890, a $1,554 spread on the same certified stone. Brilliant Earth lists it at $1,890. 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
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783653666
Dimensions8.79 × 8.72 × 5.33 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.79 mm8.72 mm2.55 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783653666
Side View
Table 58.0%Crown 35.2°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 60.9%

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: $1,890 USD|Low: $323 USD|High: $1,950 USD|Avg: $855 USD|-3.1%
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
November 3, 2026
Retailer 11$336 USD
Retailer 4$376 USD
Retailer 3$390 USD
Retailer 6$417 USD
Retailer 12$417 USD
Retailer 8$570 USD
Retailer 13$673 USD
Retailer 2$738 USD
Retailer 14$789 USD
Retailer 10$1,222 USD
Retailer 5$1,339 USD
Retailer 9$1,445 USD
Retailer 7$1,670 USD
Brilliant Earth$1,890 USD

42 data points across 14 retailers

16 retailers$336 USD to $1,890 USD

A
Cheapest Retailer
-
$336 USD
A
Retailer 2
-
$376 USD
View
Final sale: no returns
A
Retailer 3
-
$390 USD
View
A
Retailer 4
-
$417 USD
View
Retailer 5
-
$417 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$570 USD
View
B+
Retailer 7
-
$673 USD
View
A
Retailer 8
-
$738 USD
£581 GBP
View
B+
Retailer 9
-
$789 USD
View
B+
Retailer 10
-
$851 USD
View
B
Retailer 11
-
$1,222 USD
View
B
Retailer 12
-
$1,339 USD
View
B
Retailer 13
-
$1,383 USD
View
B
Retailer 14
-
$1,445 USD
View
B
Retailer 15
-
$1,670 USD
£1,315 GBP
View
Most Expensive
B
Brilliant Earth
18159735A · Nov 1
$1,890 USD
View
15 more retailers have this diamond
Prices start from $336 USDSave up to $1,554 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
$336 USD