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Round|Lab Grown|IGI

1.51ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG818644680

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818644680

Diamond specifications and retailer prices

From $327 USD
As of November 3, 2026
Save $2,523 USD (89%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $2,850 USD at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct 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 LG818644680 or 818644680. Listed at 23 retailers as of November 3, 2026, with prices from $327 to $2,850, a $2,523 spread on the same certified stone. Brilliant Earth lists it at $2,850. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
F
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818644680
Dimensions7.34 × 7.37 × 4.48 mm
L/W Ratio1.00
Girdle conditionFaceted
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
7.34 mm7.37 mm1.51 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818644680
Side View
Table 60.0%Crown 35.3°Girdle: MediumPavilion 40.5°Culet: NoneDepth 60.9%

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: Nov 3
Current: $2,850 USD|Low: $327 USD|High: $3,350 USD|Avg: $1,098 USD|-14.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 4, 2026
Retailer 3$327 USD
Retailer 4$545 USD
Retailer 12$560 USD
Retailer 2$573 USD
Retailer 8$646 USD
Retailer 10$698 USD
Retailer 7$715 USD
Retailer 6$951 USD
Retailer 9$1,014 USD
Retailer 11$1,623 USD
Retailer 5$1,875 USD
Brilliant Earth$2,850 USD

33 data points across 12 retailers

23 retailers$327 USD to $2,850 USD

A
Cheapest Retailer
-
$327 USD
A
Retailer 2
-
$366 USD
View
Final sale: no returns
A
Retailer 3
-
$379 USD
View
A
Retailer 4
-
$405 USD
View
Retailer 5
-
$405 USD
View
Price last confirmed 10 days ago
A
Retailer 6
-
$448 USD
View
A
Retailer 7
-
$545 USD
View
A
Retailer 8
-
$560 USD
View
A
Retailer 9
-
$573 USD
View
A
Retailer 10
-
$646 USD
View
A
Retailer 11
-
$698 USD
View
A
Retailer 12
-
$715 USD
View
B+
Retailer 13
-
$864 USD
View
B+
Retailer 14
-
$951 USD
View
B+
Retailer 15
-
$1,014 USD
View
B+
Retailer 16
-
$1,286 USD
View
B
Retailer 17
-
$1,296 USD
View
B
Retailer 18
-
$1,302 USD
View
B
Retailer 19
-
$1,346 USD
View
B
Retailer 20
-
$1,530 USD
View
B+
Retailer 21
-
$1,623 USD
View
B
Retailer 22
-
$1,875 USD
View
Most Expensive
B
Brilliant Earth
21133635A · Nov 3
$2,850 USD
View
22 more retailers have this diamond
Prices start from $327 USDSave up to $2,523 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
1.51ct Round
$327 USD