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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 $378 SGD
$296 USD
As of October 29, 2026
Save $2,651 SGD (88%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $3,030 SGD at Brilliant Earth · As of October 29, 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 29, 2026, with prices from $378 to $3,030, a $2,651 spread on the same certified stone. Brilliant Earth lists it at $3,030. 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
Colour
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $3,030 SGD|Low: $368 SGD|High: $3,196 SGD|Avg: $1,037 SGD|-5.2%
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
October 30, 2026
Retailer 6$378 SGD
Retailer 9$430 SGD
Retailer 13$438 SGD
Retailer 3$469 SGD
Retailer 4$469 SGD
Retailer 5$629 SGD
Retailer 12$671 SGD
Retailer 2$707 SGD
Retailer 11$766 SGD
Retailer 10$827 SGD
Retailer 15$879 SGD
Retailer 17$951 SGD
Retailer 14$1,199 SGD
Retailer 7$1,507 SGD
Retailer 16$1,888 SGD
Retailer 8$1,956 SGD
Brilliant Earth$3,030 SGD

44 data points across 17 retailers

20 retailers$378 SGD to $3,030 SGD

A
Cheapest Retailer
-
$378 SGD
$296 USD
A
Retailer 2
-
$430 SGD
$336 USD
View
Final sale: no returns
A
Retailer 3
-
$438 SGD
$343 USD
View
A
Retailer 4
-
$469 SGD
$367 USD
View
A
Retailer 5
-
$469 SGD
$367 USD
View
B+
Retailer 6
-
$629 SGD
$492 USD
View
A
Retailer 7
-
$671 SGD
$525 USD
View
A
Retailer 8
-
$707 SGD
£435 GBP
View
A
Retailer 9
-
$766 SGD
€571 EUR
View
A
Retailer 10
-
$827 SGD
£509 GBP
View
A
Retailer 11
-
$879 SGD
A$1,058 AUD
View
A
Retailer 12
-
$951 SGD
$744 USD
View
A
Retailer 13
-
$992 SGD
$776 USD
View
B+
Retailer 14
-
$1,199 SGD
$938 USD
View
Retailer 15
-
$1,332 SGD
$1,042 USD
View
Price last confirmed 44 days ago
B+
Retailer 16
-
$1,507 SGD
$1,179 USD
View
B
Retailer 17
-
$1,888 SGD
£1,163 GBP
View
Retailer 18
-
$1,937 SGD
$1,515 USD
View
Price last confirmed 9 days ago
Retailer 19
-
$1,956 SGD
$1,530 USD
View
Price last confirmed 16 days ago
Most Expensive
B
Brilliant Earth
15692000A · Oct 29
$3,030 SGD
$2,370 USD
View
19 more retailers have this diamond
Prices start from $378 SGDSave up to $2,651 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
2.57ct Round
$378 SGD