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Round|Lab Grown|IGI

0.40ct J IF Round Lab Grown Diamond

EX • J/IF • IGI LGF5F21511

Certificate IGI LGF5F21511

Diamond specifications and retailer prices

From $631 CAD
£355 GBP
As of October 30, 2026
Save $440 CAD (41%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,071 CAD at 18carati · As of October 28, 2026
View at 18carati

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 LGF5F21511 or F5F21511. Listed at 2 retailers as of October 28, 2026, with prices from $631 to $1,071, a $440 spread on the same certified stone. 18carati lists it at $1,071. 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 LGF5F21511
Dimensions4.82 × 4.84 × 2.84 mm
L/W Ratio1.00
Top View
4.82 mm4.84 mm0.40 ctJ / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LGF5F21511
Side View
Table 58.5%CrownGirdlePavilionCulet: NoneDepth 58.8%

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 30
Current: $1,071 CAD|Low: $603 CAD|High: $1,071 CAD|Avg: $840 CAD|+4.3%
18carati
Retailer 2
October 30, 2026
Retailer 2$631 CAD
18carati$1,071 CAD

30 data points across 2 retailers

2 retailers$631 CAD to $1,071 CAD

B+
Cheapest Retailer
-
$631 CAD
£355 GBP
Most Expensive
B
18carati
NK-1511JIF-0040 · Oct 28
$1,071 CAD
€730 EUR
View
1 more retailer has this diamond
Prices start from $631 CADSave up to $440 CAD

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+
0.40ct Round
$631 CAD