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Round|Lab Grown|IGI

2.57ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG804635874

Shape and cutting style on the report: Round brilliant

Certificate IGI LG804635874

Diamond specifications and retailer prices

From €565 EUR
£497 GBP
As of October 31, 2026
Save €1,897 EUR (77%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €2,461 EUR at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

About this 2.57ct lab-grown round diamond

This 2.57ct 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 LG804635874 or 804635874. Listed at 4 retailers as of October 30, 2026, with prices from €565 to €2,461, a €1,897 spread on the same certified stone. Helzberg Diamonds lists it at €2,461. 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

2.57
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804635874
Dimensions8.74 × 8.70 × 5.45 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.74 mm8.70 mm2.57 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804635874
Side View
Table 57.0%Crown 35.9°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

Caratlytics Score

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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 31
Current: €2,461 EUR|Low: €164 EUR|High: €2,461 EUR|Avg: €773 EUR
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 4€164 EUR
Retailer 8€234 EUR
Retailer 6€278 EUR
Retailer 9€290 EUR
Retailer 13€295 EUR
Retailer 11€460 EUR
Retailer 10€544 EUR
Retailer 2€565 EUR
Retailer 12€683 EUR
Retailer 3€821 EUR
Retailer 5€1,439 EUR
Retailer 7€1,763 EUR
Helzberg Diamonds€2,461 EUR

28 data points across 13 retailers

4 retailers€565 EUR to €2,461 EUR

Retailer 1
-
€234 EUR
$261 USD
Price last confirmed 44 days ago
A
Retailer 2
-
€565 EUR
£497 GBP
View
B
Retailer 3
-
€1,763 EUR
$1,970 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOGKMJLONK · Oct 30
€2,461 EUR
$2,750 USD
View
3 more retailers have this diamond
Prices start from €565 EURSave up to €1,897 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
2.57ct Round
€565 EUR