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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 $286 USD
As of October 29, 2026
Save $1,183 USD (81%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,940 USD 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 29, 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $1,940 USD|Low: $286 USD|High: $1,965 USD|Avg: $748 USD|-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 31, 2026
Retailer 14$286 USD
Retailer 6$319 USD
Retailer 12$332 USD
Retailer 2$355 USD
Retailer 17$355 USD
Retailer 13$505 USD
Retailer 8$584 USD
Retailer 15$585 USD
Retailer 4$600 USD
Retailer 9$618 USD
Retailer 10$625 USD
Retailer 3$833 USD
Retailer 5$1,090 USD
Retailer 11$1,141 USD
Retailer 7$1,365 USD
Retailer 16$1,430 USD
Rare Carat$1,940 USD

35 data points across 17 retailers

20 retailers$286 USD to $1,469 USD

A
Cheapest Retailer
-
$286 USD
A
Retailer 2
-
$319 USD
View
Final sale: no returns
A
Retailer 3
-
$332 USD
View
A
Retailer 4
-
$355 USD
View
A
Retailer 5
-
$355 USD
View
A
Retailer 6
-
$505 USD
£398 GBP
View
A
Retailer 7
-
$584 USD
View
A
Retailer 8
-
$585 USD
View
Retailer 9
-
$600 USD
ZAR 9,695 ZAR
View
Price last confirmed 8 days ago
A
Retailer 10
-
$618 USD
View
A
Retailer 11
-
$625 USD
£492 GBP
View
A
Retailer 12
-
$833 USD
A$1,282 AUD
View
B+
Retailer 13
-
$909 USD
View
B+
Retailer 14
-
$1,090 USD
View
B+
Retailer 15
-
$1,141 USD
View
B+
Retailer 16
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$1,190 USD
View
B+
Retailer 17
-
$1,365 USD
View
B+
Retailer 18
-
$1,430 USD
£1,126 GBP
View
B
Retailer 19
-
$1,469 USD
View
Most Expensive
Rare Carat
8804_l_645410374 · Oct 21
$1,940 USD
View
Price last confirmed 10 days ago
19 more retailers have this diamond
Prices start from $286 USDSave up to $1,183 USD

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
$286 USD