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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 $507 NZD
$286 USD
As of November 1, 2026
Save $2,098 NZD (81%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $3,442 NZD 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 November 1, 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: Nov 1
Current: $3,442 NZD|Low: $507 NZD|High: $3,486 NZD|Avg: $1,372 NZD|-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
November 2, 2026
Retailer 14$507 NZD
Retailer 6$566 NZD
Retailer 13$589 NZD
Retailer 3$630 NZD
Retailer 11$630 NZD
Retailer 2$893 NZD
Retailer 8$1,036 NZD
Retailer 15$1,038 NZD
Retailer 10$1,086 NZD
Retailer 9$1,109 NZD
Retailer 4$1,479 NZD
Retailer 5$1,934 NZD
Retailer 12$2,024 NZD
Retailer 7$2,422 NZD
Retailer 16$2,537 NZD
Rare Carat$3,442 NZD

34 data points across 16 retailers

20 retailers$507 NZD to $2,606 NZD

A
Cheapest Retailer
-
$507 NZD
$286 USD
A
Retailer 2
-
$566 NZD
$319 USD
View
Final sale: no returns
A
Retailer 3
-
$589 NZD
$332 USD
View
A
Retailer 4
-
$630 NZD
$355 USD
View
Retailer 5
-
$630 NZD
$355 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$893 NZD
£397 GBP
View
A
Retailer 7
-
$1,036 NZD
$584 USD
View
A
Retailer 8
-
$1,038 NZD
$585 USD
View
A
Retailer 9
-
$1,086 NZD
ZAR 9,885 ZAR
View
A
Retailer 10
-
$1,097 NZD
$618 USD
View
A
Retailer 11
-
$1,109 NZD
£492 GBP
View
Retailer 12
-
$1,479 NZD
A$1,282 AUD
View
Price last confirmed 8 days ago
B+
Retailer 13
-
$1,613 NZD
$909 USD
View
B+
Retailer 14
-
$1,934 NZD
$1,090 USD
View
B+
Retailer 15
-
$2,024 NZD
$1,141 USD
View
B+
Retailer 16
-
$2,111 NZD
$1,190 USD
View
B+
Retailer 17
-
$2,422 NZD
$1,365 USD
View
B+
Retailer 18
-
$2,537 NZD
£1,126 GBP
View
B
Retailer 19
-
$2,606 NZD
$1,469 USD
View
Most Expensive
Rare Carat
8804_l_645410374 · Oct 21
$3,442 NZD
$1,940 USD
View
Price last confirmed 11 days ago
19 more retailers have this diamond
Prices start from $507 NZDSave up to $2,098 NZD

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
$507 NZD