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Radiant|Lab Grown|IGI

2.57ct F IF Radiant Lab Grown Diamond

EX • F/IF • IGI LG840652908

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

Certificate IGI LG840652908

Diamond specifications and retailer prices

From $715 AUD
$501 USD
As of November 1, 2026
Save $4,964 AUD (87%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $5,950 AUD at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 2.57ct lab-grown radiant diamond

This 2.57ct lab-grown radiant sits in the two to three carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840652908 or 840652908. Listed at 16 retailers as of November 1, 2026, with a 694% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.3°
Pavilion angle36.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840652908
Dimensions8.94 × 7.22 × 4.75 mm
L/W Ratio1.24
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.94 mm7.22 mm2.57 ctF / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840652908
Side View
Table 64.0%Crown 40.3°Girdle: MED-STKPavilion 36.8°Culet: NoneDepth 65.8%

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 1
Current: $5,950 AUD|Low: $715 AUD|High: $5,950 AUD|Avg: $2,589 AUD
Rare Carat
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 3$715 AUD
Retailer 9$925 AUD
Retailer 4$1,052 AUD
Retailer 13$1,063 AUD
Retailer 10$1,455 AUD
Retailer 14$1,942 AUD
Retailer 2$2,025 AUD
Retailer 15$2,111 AUD
Retailer 7$2,240 AUD
Retailer 5$2,967 AUD
Retailer 8$3,018 AUD
Retailer 6$3,062 AUD
Retailer 11$3,653 AUD
Retailer 12$4,469 AUD
Retailer 16$5,679 AUD
Rare Carat$5,950 AUD

13 data points across 16 retailers

16 retailers$715 AUD to $5,679 AUD

A
Cheapest Retailer
-
$715 AUD
$501 USD
Final sale: no returns
A
Retailer 2
-
$925 AUD
£511 GBP
View
B+
Retailer 3
-
$1,052 AUD
$737 USD
View
A
Retailer 4
-
$1,063 AUD
$745 USD
View
A
Retailer 5
-
$1,455 AUD
£803 GBP
View
A
Retailer 6
-
$1,942 AUD
View
A
Retailer 7
-
$2,025 AUD
$1,419 USD
View
A
Retailer 8
-
$2,111 AUD
ZAR 23,904 ZAR
View
A
Retailer 9
-
$2,240 AUD
$1,570 USD
View
A
Retailer 10
-
$2,967 AUD
$2,079 USD
View
A
Retailer 11
-
$3,018 AUD
$2,115 USD
View
A
Retailer 12
-
$3,062 AUD
SGD 2,900 SGD
View
B+
Retailer 13
-
$3,653 AUD
£2,016 GBP
View
B+
Retailer 14
-
$4,469 AUD
View
B
Retailer 15
-
$5,679 AUD
$3,980 USD
View
Most Expensive
Rare Carat
LA2653 · Oct 21
$5,950 AUD
$4,170 USD
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from $715 AUDSave up to $4,964 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
$715 AUD