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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 $1,250 AUD
$878 USD
As of November 2, 2026
Save $7,406 AUD (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $8,655 AUD at Brilliant Earth · As of October 31, 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 13 retailers as of October 31, 2026, with prices from $1,250 to $8,655, a $7,406 spread on the same certified stone. Brilliant Earth lists it at $8,655. 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

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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: Nov 2
Current: $8,655 AUD|Low: $843 AUD|High: $8,869 AUD|Avg: $3,533 AUD|-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
November 2, 2026
Retailer 6$843 AUD
Retailer 15$1,250 AUD
Retailer 9$1,360 AUD
Retailer 14$1,399 AUD
Retailer 4$1,449 AUD
Retailer 2$1,466 AUD
Retailer 13$2,328 AUD
Retailer 12$3,440 AUD
Retailer 8$3,668 AUD
Retailer 3$4,035 AUD
Retailer 11$4,074 AUD
Retailer 7$4,644 AUD
Retailer 16$5,078 AUD
Retailer 5$5,150 AUD
Retailer 10$5,433 AUD
Brilliant Earth$8,655 AUD

27 data points across 16 retailers

13 retailers$1,250 AUD to $8,655 AUD

A
Cheapest Retailer
-
$1,250 AUD
$878 USD
A
Retailer 2
-
$1,360 AUD
$955 USD
View
A
Retailer 3
-
$1,399 AUD
$983 USD
View
Final sale: no returns
A
Retailer 4
-
$1,449 AUD
$1,018 USD
View
A
Retailer 5
-
$1,466 AUD
£811 GBP
View
A
Retailer 6
-
$2,328 AUD
$1,635 USD
View
A
Retailer 7
-
$3,440 AUD
View
B+
Retailer 8
-
$4,035 AUD
£2,232 GBP
View
B+
Retailer 9
-
$4,074 AUD
$2,862 USD
View
B+
Retailer 10
-
$5,078 AUD
$3,567 USD
View
Retailer 11
-
$5,150 AUD
View
Price last confirmed 25 days ago
B+
Retailer 12
-
$5,433 AUD
£3,005 GBP
View
Most Expensive
B
Brilliant Earth
21535490A · Oct 31
$8,655 AUD
$6,080 USD
View
12 more retailers have this diamond
Prices start from $1,250 AUDSave up to $7,406 AUD

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
$1,250 AUD