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Radiant|Lab Grown|IGI

2.57ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG685528891

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG685528891

Diamond specifications and retailer prices

From $1,560 NZD
$878 USD
As of November 2, 2026
Save $9,246 NZD (86%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $10,806 NZD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 2.57ct lab-grown radiant diamond

This 2.57ct lab-grown radiant sits in the two to three carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG685528891 or 685528891. Listed at 14 retailers as of November 2, 2026, with prices from $1,560 to $10,806, a $9,246 spread on the same certified stone. Brilliant Earth lists it at $10,806. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

2.57
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.6°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685528891
Dimensions9.98 × 6.61 × 4.39 mm
L/W Ratio1.51
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.98 mm6.61 mm2.57 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685528891
Side View
Table 63.0%Crown 42.6°Girdle: MediumPavilion 34.5°Culet: NoneDepth 66.4%

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 2
Current: $10,806 NZD|Low: $1,052 NZD|High: $11,073 NZD|Avg: $4,407 NZD|-2.4%
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 7$1,052 NZD
Retailer 17$1,560 NZD
Retailer 11$1,697 NZD
Retailer 16$1,747 NZD
Retailer 5$1,809 NZD
Retailer 10$1,830 NZD
Retailer 2$2,771 NZD
Retailer 15$2,906 NZD
Retailer 14$4,295 NZD
Retailer 9$4,579 NZD
Retailer 4$5,038 NZD
Retailer 13$5,087 NZD
Retailer 8$5,798 NZD
Retailer 3$6,339 NZD
Retailer 6$6,430 NZD
Retailer 12$6,783 NZD
Brilliant Earth$10,806 NZD

27 data points across 17 retailers

14 retailers$1,560 NZD to $10,806 NZD

A
Cheapest Retailer
-
$1,560 NZD
$878 USD
A
Retailer 2
-
$1,697 NZD
$955 USD
View
A
Retailer 3
-
$1,747 NZD
$983 USD
View
Final sale: no returns
A
Retailer 4
-
$1,809 NZD
$1,018 USD
View
A
Retailer 5
-
$1,830 NZD
£811 GBP
View
A
Retailer 6
-
$2,771 NZD
€1,485 EUR
View
A
Retailer 7
-
$2,906 NZD
$1,635 USD
View
A
Retailer 8
-
$4,295 NZD
A$3,718 AUD
View
B+
Retailer 9
-
$5,038 NZD
£2,232 GBP
View
B+
Retailer 10
-
$5,087 NZD
$2,862 USD
View
B+
Retailer 11
-
$6,339 NZD
$3,567 USD
View
Retailer 12
-
$6,430 NZD
A$5,566 AUD
View
Price last confirmed 25 days ago
B+
Retailer 13
-
$6,783 NZD
£3,005 GBP
View
Most Expensive
B
Brilliant Earth
21535490A · Nov 2
$10,806 NZD
$6,080 USD
View
13 more retailers have this diamond
Prices start from $1,560 NZDSave up to $9,246 NZD

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 Radiant
$1,560 NZD