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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 €325 EUR
$363 USD
As of October 29, 2026
Save €2,906 EUR (90%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €3,231 EUR 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 €325 to €3,231, a €2,906 spread on the same certified stone. Brilliant Earth lists it at €3,231. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: €3,231 EUR|Low: €320 EUR|High: €3,330 EUR|Avg: €1,048 EUR|-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€325 EUR
Retailer 11€372 EUR
Retailer 6€644 EUR
Retailer 4€644 EUR
Retailer 8€676 EUR
Retailer 3€717 EUR
Retailer 5€736 EUR
Retailer 7€1,182 EUR
Retailer 9€1,295 EUR
Retailer 2€1,582 EUR
Brilliant Earth€3,231 EUR

29 data points across 11 retailers

13 retailers€325 EUR to €3,231 EUR

A
Cheapest Retailer
-
€325 EUR
$363 USD
Retailer 2
-
€333 EUR
$372 USD
View
Price last confirmed 39 days ago
A
Retailer 3
-
€372 EUR
$416 USD
View
Final sale: no returns
Retailer 4
-
€386 EUR
$431 USD
View
Price last confirmed 37 days ago
B+
Retailer 5
-
€644 EUR
$719 USD
View
A
Retailer 6
-
€644 EUR
$720 USD
View
A
Retailer 7
-
€676 EUR
$755 USD
View
A
Retailer 8
-
€736 EUR
View
B+
Retailer 9
-
€1,182 EUR
$1,320 USD
View
B+
Retailer 10
-
€1,295 EUR
$1,447 USD
View
Retailer 11
-
€1,326 EUR
$1,481 USD
View
Price last confirmed 34 days ago
B
Retailer 12
-
€1,582 EUR
£1,392 GBP
View
Most Expensive
B
Brilliant Earth
18093133A · Oct 26
€3,231 EUR
$3,610 USD
View
12 more retailers have this diamond
Prices start from €325 EURSave up to €2,906 EUR

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
€325 EUR