CaratHunter
Plans
Round|Lab Grown|IGI

2.57ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG731507717

Shape and cutting style on the report: Round brilliant

Certificate IGI LG731507717

Diamond specifications and retailer prices

From €265 EUR
$296 USD
As of November 1, 2026
Save €1,749 EUR (87%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €2,014 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

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 LG731507717 or 731507717. Listed at 20 retailers as of October 31, 2026, with prices from €265 to €2,014, a €1,749 spread on the same certified stone. Brilliant Earth lists it at €2,014. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731507717
Dimensions8.87 × 8.79 × 5.44 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
8.87 mm8.79 mm2.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731507717
Side View
Table 55.0%Crown 33°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.6%

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: Nov 1
Current: €2,014 EUR|Low: €258 EUR|High: €2,238 EUR|Avg: €724 EUR|-10.0%
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
Retailer 15
Retailer 16
Retailer 17
November 2, 2026
Retailer 6€265 EUR
Retailer 9€301 EUR
Retailer 14€307 EUR
Retailer 3€328 EUR
Retailer 4€328 EUR
Retailer 5€440 EUR
Retailer 13€470 EUR
Retailer 2€493 EUR
Retailer 10€537 EUR
Retailer 11€575 EUR
Retailer 16€616 EUR
Retailer 17€666 EUR
Retailer 15€840 EUR
Retailer 7€1,055 EUR
Retailer 12€1,315 EUR
Retailer 8€1,369 EUR
Brilliant Earth€2,014 EUR

41 data points across 17 retailers

20 retailers€265 EUR to €2,014 EUR

A
Cheapest Retailer
-
€265 EUR
$296 USD
A
Retailer 2
-
€301 EUR
$336 USD
View
Final sale: no returns
A
Retailer 3
-
€307 EUR
$343 USD
View
A
Retailer 4
-
€328 EUR
$367 USD
View
Retailer 5
-
€328 EUR
$367 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
€440 EUR
$492 USD
View
A
Retailer 7
-
€470 EUR
$525 USD
View
A
Retailer 8
-
€493 EUR
£434 GBP
View
A
Retailer 9
-
€537 EUR
View
A
Retailer 10
-
€575 EUR
£506 GBP
View
A
Retailer 11
-
€616 EUR
A$1,058 AUD
View
A
Retailer 12
-
€666 EUR
$744 USD
View
A
Retailer 13
-
€695 EUR
$776 USD
View
B+
Retailer 14
-
€840 EUR
$938 USD
View
Retailer 15
-
€933 EUR
$1,042 USD
View
Price last confirmed 47 days ago
B+
Retailer 16
-
€1,055 EUR
$1,179 USD
View
B+
Retailer 17
-
€1,315 EUR
£1,157 GBP
View
B
Retailer 18
-
€1,356 EUR
$1,515 USD
View
Retailer 19
-
€1,369 EUR
$1,530 USD
View
Price last confirmed 19 days ago
Most Expensive
B
Brilliant Earth
15692000A · Oct 31
€2,014 EUR
$2,250 USD
View
19 more retailers have this diamond
Prices start from €265 EURSave up to €1,749 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
€265 EUR