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1.39ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG766644620

Shape and cutting style on the report: Round brilliant

Certificate IGI LG766644620

Diamond specifications and retailer prices

From $393 USD
€374 EUR
As of November 2, 2026
Save $688 USD (64%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,081 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.39ct lab-grown round diamond

This 1.39ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG766644620 or 766644620. Listed at 9 retailers as of November 1, 2026, with prices from $393 to $1,081, a $688 spread on the same certified stone. MOH London lists it at $1,081. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.39
Carat
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766644620
Dimensions7.13 × 7.08 × 4.47 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
7.13 mm7.08 mm1.39 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766644620
Side View
Table 57.0%Crown 36.1°Girdle: MediumPavilion 41.2°Culet: NoneDepth 63.0%

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 2
Current: $1,081 USD|Low: $374 USD|High: $1,113 USD|Avg: $543 USD|-2.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 3$393 USD
Retailer 7$406 USD
Retailer 4$418 USD
Retailer 8$474 USD
Retailer 6$485 USD
Retailer 5$495 USD
Retailer 2$615 USD
Retailer 9$660 USD
MOH London$1,081 USD

35 data points across 9 retailers

9 retailers$393 USD to $1,081 USD

A
Cheapest Retailer
-
$393 USD
€374 EUR
B+
Retailer 2
-
$406 USD
View
A
Retailer 3
-
$418 USD
£329 GBP
View
A
Retailer 4
-
$474 USD
View
A
Retailer 5
-
$485 USD
View
A
Retailer 6
-
$495 USD
View
B+
Retailer 7
-
$615 USD
View
B+
Retailer 8
-
$660 USD
View
Most Expensive
B
MOH London
LG766644620 · Nov 1
$1,081 USD
£851 GBP
View
8 more retailers have this diamond
Prices start from $393 USDSave up to $688 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
1.39ct Round
$393 USD