CaratHunter
Plans
Marquise|Lab Grown|IGI

2.57ct F IF Marquise Lab Grown Diamond

ID • F/IF • IGI LG837640757

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG837640757

Diamond specifications and retailer prices

From $1,575 AUD
$1,104 USD
As of November 1, 2026
Save $8,670 AUD (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $10,245 AUD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 2.57ct lab-grown marquise diamond

This 2.57ct lab-grown marquise 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 LG837640757 or 837640757. Listed at 19 retailers as of November 1, 2026, with prices from $1,575 to $10,245, a $8,670 spread on the same certified stone. Brilliant Earth lists it at $10,245. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.1°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837640757
Dimensions15.09 × 7.01 × 4.20 mm
L/W Ratio2.15
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.09 mm7.01 mm2.57 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837640757
Side View
Table 61.0%Crown 38.1°Girdle: MED-STKPavilion 39.4°Culet: NoneDepth 59.9%

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: $10,245 AUD|Low: $1,575 AUD|High: $10,259 AUD|Avg: $4,135 AUD|-0.1%
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
Retailer 18
November 2, 2026
Retailer 3$1,575 AUD
Retailer 2$1,845 AUD
Retailer 6$1,884 AUD
Retailer 4$2,337 AUD
Retailer 17$2,477 AUD
Retailer 11$2,518 AUD
Retailer 7$3,113 AUD
Retailer 18$3,517 AUD
Retailer 14$3,875 AUD
Retailer 16$4,211 AUD
Retailer 9$4,501 AUD
Retailer 13$5,061 AUD
Retailer 12$5,536 AUD
Retailer 8$5,687 AUD
Retailer 5$5,886 AUD
Retailer 15$6,213 AUD
Retailer 10$6,307 AUD
Brilliant Earth$10,245 AUD

24 data points across 18 retailers

19 retailers$1,575 AUD to $10,245 AUD

A
Cheapest Retailer
-
$1,575 AUD
$1,104 USD
Final sale: no returns
A
Retailer 2
-
$1,845 AUD
£1,018 GBP
View
A
Retailer 3
-
$1,884 AUD
$1,320 USD
View
A
Retailer 4
-
$2,337 AUD
$1,638 USD
View
A
Retailer 5
-
$2,477 AUD
€1,653 EUR
View
A
Retailer 6
-
$2,518 AUD
£1,390 GBP
View
A
Retailer 7
-
$3,113 AUD
$2,182 USD
View
A
Retailer 8
-
$3,517 AUD
$2,465 USD
View
A
Retailer 9
-
$3,875 AUD
View
A
Retailer 10
-
$4,211 AUD
ZAR 47,676 ZAR
View
B+
Retailer 11
-
$4,501 AUD
£2,484 GBP
View
B+
Retailer 12
-
$5,061 AUD
$3,547 USD
View
B+
Retailer 13
-
$5,536 AUD
£3,055 GBP
View
B+
Retailer 14
-
$5,687 AUD
$3,986 USD
View
B+
Retailer 15
-
$5,886 AUD
$4,125 USD
View
B+
Retailer 16
-
$6,213 AUD
View
B
Retailer 17
-
$6,307 AUD
SGD 5,973 SGD
View
Retailer 18
-
$7,143 AUD
$5,006 USD
View
Price last confirmed 20 days ago
Most Expensive
B
Brilliant Earth
21558666A · Nov 2
$10,245 AUD
$7,180 USD
View
18 more retailers have this diamond
Prices start from $1,575 AUDSave up to $8,670 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 Marquise
$1,575 AUD