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Round|Lab Grown|IGI

0.40ct J IF Round Lab Grown Diamond

EX • J/IF • IGI LGF6D39120

Certificate IGI LGF6D39120

Diamond specifications and retailer prices

From $451 USD
£355 GBP
As of October 30, 2026
1 retailer carries this diamond
Only listing: $451 USD at 77 Diamonds
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at 77 Diamonds

About this 0.4ct lab-grown round diamond

This 0.4ct lab-grown round sits in the sub-half-carat band, graded J colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LGF6D39120 or F6D39120. Listed at a single retailer as of October 30, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.40
Carat
J
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LGF6D39120
Dimensions4.77 × 4.81 × 2.83 mm
L/W Ratio1.01
Top View
4.77 mm4.81 mm0.40 ctJ / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LGF6D39120
Side View
Table 63.0%CrownGirdlePavilionCulet: NoneDepth 59.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 30
Current: $451 USD|Low: $432 USD|High: $767 USD|Avg: $601 USD|+0.5%
77 Diamonds
Retailer 2
October 30, 2026
77 Diamonds$451 USD
Retailer 2$767 USD

30 data points across 2 retailers

1 retailer

B
77 Diamonds
RBCF87XMRQGQ · Oct 30
$451 USD
£355 GBP
View

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B
0.40ct Round
$451 USD