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Round|Lab Grown|IGI

2.78ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG654490555

Shape and cutting style on the report: Round brilliant

Certificate IGI LG654490555

Diamond specifications and retailer prices

From $298 USD
As of October 29, 2026
Save $1,190 USD (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,488 USD at MOH London · As of October 29, 2026
View at MOH London

About this 2.78ct lab-grown round diamond

This 2.78ct 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 LG654490555 or 654490555. Listed at 14 retailers as of October 29, 2026, with prices from $298 to $1,488, a $1,190 spread on the same certified stone. MOH London lists it at $1,488. 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

2.78
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG654490555
Dimensions9.11 × 9.05 × 5.54 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
9.11 mm9.05 mm2.78 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG654490555
Side View
Table 57.0%Crown 34.6°Girdle: MED-STKPavilion 40.9°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: Oct 29
Current: $1,488 USD|Low: $298 USD|High: $4,082 USD|Avg: $1,161 USD
MOH London
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
Retailer 15
Retailer 16
Retailer 17
October 31, 2026
Retailer 12$298 USD
Retailer 6$346 USD
Retailer 5$370 USD
Retailer 16$410 USD
Retailer 13$525 USD
Retailer 14$601 USD
Retailer 3$604 USD
Retailer 11$609 USD
Retailer 2$654 USD
Retailer 15$680 USD
Retailer 17$919 USD
Retailer 10$1,136 USD
Retailer 4$1,188 USD
MOH London$1,488 USD
Retailer 7$1,914 USD
Retailer 9$2,680 USD
Retailer 8$4,082 USD

5 data points across 17 retailers

14 retailers$298 USD to $1,488 USD

A
Cheapest Retailer
-
$298 USD
A
Retailer 2
-
$346 USD
View
A
Retailer 3
-
$370 USD
View
A
Retailer 4
-
$410 USD
HK$3,200 HKD
View
A
Retailer 5
-
$525 USD
View
A
Retailer 6
-
$601 USD
€572 EUR
View
B+
Retailer 7
-
$604 USD
View
A
Retailer 8
-
$609 USD
£479 GBP
View
A
Retailer 9
-
$654 USD
£515 GBP
View
A
Retailer 10
-
$680 USD
View
B+
Retailer 11
-
$919 USD
View
B+
Retailer 12
-
$1,136 USD
View
B+
Retailer 13
-
$1,188 USD
View
Most Expensive
B
MOH London
LG654490555 · Oct 29
$1,488 USD
£1,172 GBP
View
13 more retailers have this diamond
Prices start from $298 USDSave up to $1,190 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
2.78ct Round
$298 USD