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Round|Lab Grown|IGI

2.78ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG771602855

Shape and cutting style on the report: Round brilliant

Certificate IGI LG771602855

Diamond specifications and retailer prices

From $464 SGD
$363 USD
As of October 29, 2026
Save $4,151 SGD (90%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,615 SGD at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 2.78ct lab-grown round diamond

This 2.78ct lab-grown round sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG771602855 or 771602855. Listed at 13 retailers as of October 26, 2026, with prices from $464 to $4,615, a $4,151 spread on the same certified stone. Brilliant Earth lists it at $4,615. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771602855
Dimensions9.09 × 9.05 × 5.49 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
9.09 mm9.05 mm2.78 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771602855
Side View
Table 59.0%Crown 34°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.5%

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: $4,615 SGD|Low: $380 SGD|High: $4,756 SGD|Avg: $1,496 SGD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 10$464 SGD
Retailer 11$532 SGD
Retailer 6$919 SGD
Retailer 4$920 SGD
Retailer 8$965 SGD
Retailer 3$1,025 SGD
Retailer 5$1,051 SGD
Retailer 7$1,687 SGD
Retailer 9$1,850 SGD
Retailer 2$2,260 SGD
Brilliant Earth$4,615 SGD

30 data points across 11 retailers

13 retailers$464 SGD to $4,615 SGD

A
Cheapest Retailer
-
$464 SGD
$363 USD
Retailer 2
-
$476 SGD
$372 USD
View
Price last confirmed 38 days ago
A
Retailer 3
-
$532 SGD
$416 USD
View
Final sale: no returns
Retailer 4
-
$551 SGD
$431 USD
View
Price last confirmed 37 days ago
B+
Retailer 5
-
$919 SGD
$719 USD
View
A
Retailer 6
-
$920 SGD
$720 USD
View
A
Retailer 7
-
$965 SGD
$755 USD
View
A
Retailer 8
-
$1,051 SGD
€783 EUR
View
B+
Retailer 9
-
$1,687 SGD
$1,320 USD
View
B+
Retailer 10
-
$1,850 SGD
$1,447 USD
View
Retailer 11
-
$1,893 SGD
$1,481 USD
View
Price last confirmed 33 days ago
B
Retailer 12
-
$2,260 SGD
£1,392 GBP
View
Most Expensive
B
Brilliant Earth
18093133A · Oct 26
$4,615 SGD
$3,610 USD
View
12 more retailers have this diamond
Prices start from $464 SGDSave up to $4,151 SGD

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
$464 SGD