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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 $1,645 AUD
As of October 31, 2026
7 retailers carry this diamond
Most expensive: $2,834 AUD 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 October 31, 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: Oct 31
Current: $2,834 AUD|Low: $656 AUD|High: $5,210 AUD|Avg: $2,051 AUD
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$656 AUD
Retailer 3$727 AUD
Retailer 9$1,049 AUD
Retailer 15$1,053 AUD
Retailer 6$1,112 AUD
Retailer 13$1,262 AUD
Retailer 14$1,349 AUD
Retailer 2$1,645 AUD
Retailer 16$1,876 AUD
Retailer 8$2,581 AUD
Retailer 7$2,648 AUD
Retailer 4$2,791 AUD
Rare Carat$2,834 AUD
Retailer 10$2,949 AUD
Retailer 11$2,975 AUD
Retailer 5$5,210 AUD

7 data points across 16 retailers

7 retailers

Retailer 1
-
$587 AUD
$412 USD
Price last confirmed 44 days ago
Retailer 2
-
$717 AUD
$504 USD
View
Price last confirmed 40 days ago
B+
Retailer 3
-
$1,645 AUD
View
Retailer 4
-
$1,876 AUD
$1,318 USD
View
Price last confirmed 40 days ago
Retailer 5
-
$2,311 AUD
View
Price last confirmed 96 days ago
Retailer 6
-
$2,580 AUD
$1,812 USD
View
Price last confirmed 41 days ago
Most Expensive
Rare Carat
V665679LG · Sep 13
$2,834 AUD
$1,991 USD
View
Price last confirmed 49 days ago
6 more retailers have this diamond
Prices start from $1,645 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.

B+
1.57ct Round
$1,645 AUD