CaratHunter
Plans
Round|Lab Grown|IGI

1.57ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG645410374

Shape and cutting style on the report: Round brilliant

Certificate IGI LG645410374

Diamond specifications and retailer prices

From $407 AUD
$286 USD
As of October 29, 2026
Save $1,681 AUD (81%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,758 AUD at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 1.57ct lab-grown round diamond

This 1.57ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG645410374 or 645410374. Listed at 20 retailers as of October 25, 2026, with a 413% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.57
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645410374
Dimensions7.45 × 7.43 × 4.61 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
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
7.45 mm7.43 mm1.57 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645410374
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.9%

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: Oct 29
Current: $2,758 AUD|Low: $407 AUD|High: $2,794 AUD|Avg: $1,055 AUD|-1.3%
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
Retailer 17
October 29, 2026
Retailer 2$407 AUD
Retailer 6$454 AUD
Retailer 17$472 AUD
Retailer 4$505 AUD
Retailer 14$505 AUD
Retailer 12$720 AUD
Retailer 8$830 AUD
Retailer 10$832 AUD
Retailer 3$853 AUD
Retailer 9$879 AUD
Retailer 13$884 AUD
Retailer 15$1,185 AUD
Retailer 5$1,550 AUD
Retailer 16$1,622 AUD
Retailer 7$1,941 AUD
Retailer 11$2,033 AUD
Rare Carat$2,758 AUD

35 data points across 17 retailers

20 retailers$407 AUD to $2,088 AUD

A
Cheapest Retailer
-
$407 AUD
$286 USD
A
Retailer 2
-
$454 AUD
$319 USD
View
Final sale: no returns
A
Retailer 3
-
$472 AUD
$332 USD
View
A
Retailer 4
-
$505 AUD
$355 USD
View
A
Retailer 5
-
$505 AUD
$355 USD
View
A
Retailer 6
-
$720 AUD
£399 GBP
View
A
Retailer 7
-
$830 AUD
$584 USD
View
A
Retailer 8
-
$832 AUD
$585 USD
View
A
Retailer 9
-
$853 AUD
ZAR 9,695 ZAR
View
A
Retailer 10
-
$879 AUD
$618 USD
View
A
Retailer 11
-
$884 AUD
£489 GBP
View
A
Retailer 12
-
$1,185 AUD
View
B+
Retailer 13
-
$1,293 AUD
$909 USD
View
B+
Retailer 14
-
$1,550 AUD
$1,090 USD
View
B+
Retailer 15
-
$1,622 AUD
$1,141 USD
View
B+
Retailer 16
-
$1,692 AUD
$1,190 USD
View
B+
Retailer 17
-
$1,941 AUD
$1,365 USD
View
B+
Retailer 18
-
$2,033 AUD
£1,126 GBP
View
B
Retailer 19
-
$2,088 AUD
$1,469 USD
View
Most Expensive
B
Rare Carat
8804_l_645410374 · Oct 21
$2,758 AUD
$1,940 USD
View
Price last confirmed 8 days ago
19 more retailers have this diamond
Prices start from $407 AUDSave up to $1,681 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
1.57ct Round
$407 AUD