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Round|Lab Grown|IGI

1.57ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG685518428

Shape and cutting style on the report: Round brilliant

Certificate IGI LG685518428

Diamond specifications and retailer prices

From $2,051 NZD
A$1,778 AUD
As of November 2, 2026
7 retailers carry this diamond
Most expensive: $3,532 NZD at Rare Carat · As of September 13, 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 LG685518428 or 685518428. Listed at 7 retailers as of November 2, 2026. 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 angle35.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685518428
Dimensions7.39 × 7.47 × 4.61 mm
L/W Ratio1.01
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
7.39 mm7.47 mm1.57 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685518428
Side View
Table 57.0%Crown 35.3°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $3,532 NZD|Low: $818 NZD|High: $6,494 NZD|Avg: $2,556 NZD
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
October 3, 2026
Retailer 12$818 NZD
Retailer 3$907 NZD
Retailer 9$1,308 NZD
Retailer 15$1,313 NZD
Retailer 6$1,386 NZD
Retailer 13$1,573 NZD
Retailer 14$1,681 NZD
Retailer 2$2,051 NZD
Retailer 16$2,339 NZD
Retailer 8$3,217 NZD
Retailer 7$3,301 NZD
Retailer 4$3,478 NZD
Rare Carat$3,532 NZD
Retailer 10$3,675 NZD
Retailer 11$3,708 NZD
Retailer 5$6,494 NZD

7 data points across 16 retailers

7 retailers

Retailer 1
-
$731 NZD
$412 USD
Price last confirmed 44 days ago
Retailer 2
-
$894 NZD
$504 USD
View
Price last confirmed 41 days ago
B+
Retailer 3
-
$2,051 NZD
A$1,778 AUD
View
Retailer 4
-
$2,339 NZD
$1,318 USD
View
Price last confirmed 41 days ago
Retailer 5
-
$2,880 NZD
A$2,497 AUD
View
Price last confirmed 96 days ago
Retailer 6
-
$3,215 NZD
$1,812 USD
View
Price last confirmed 42 days ago
Most Expensive
Rare Carat
V665679LG · Sep 13
$3,532 NZD
$1,991 USD
View
Price last confirmed 50 days ago
6 more retailers have this diamond
Prices start from $2,051 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.

B+
1.57ct Round
$2,051 NZD