CaratHunter
Plans
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 $1,156 USD
A$1,778 AUD
As of October 31, 2026
8 retailers carry this diamond
Most expensive: $1,991 USD 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 8 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $1,991 USD|Low: $328 USD|High: $3,660 USD|Avg: $1,436 USD
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$461 USD
Retailer 3$511 USD
Retailer 9$737 USD
Retailer 15$740 USD
Retailer 6$781 USD
Retailer 13$887 USD
Retailer 14$947 USD
Retailer 2$1,156 USD
Retailer 16$1,318 USD
Retailer 8$1,813 USD
Retailer 7$1,860 USD
Retailer 4$1,960 USD
Rare Carat$1,991 USD
Retailer 10$2,071 USD
Retailer 11$2,090 USD
Retailer 5$3,660 USD

9 data points across 16 retailers

8 retailers

Retailer 1
-
$412 USD
Price last confirmed 43 days ago
Retailer 2
-
$504 USD
View
Price last confirmed 39 days ago
Retailer 3
-
$947 USD
ZAR 15,305 ZAR
View
Price last confirmed 43 days ago
B+
Retailer 4
-
$1,156 USD
A$1,778 AUD
View
Retailer 5
-
$1,318 USD
View
Price last confirmed 39 days ago
Retailer 6
-
$1,623 USD
A$2,497 AUD
View
Price last confirmed 94 days ago
Retailer 7
-
$1,812 USD
View
Price last confirmed 40 days ago
Most Expensive
Rare Carat
V665679LG · Sep 13
$1,991 USD
View
Price last confirmed 48 days ago
7 more retailers have this diamond
Prices start from $1,156 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.

B+
1.57ct Round
$1,156 USD