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Round|Lab Grown|IGI

0.42ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • IGI LG459129634

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459129634

Diamond specifications and retailer prices

From $259 USD
As of November 1, 2026
Save $1,029 USD (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,288 USD at MOH London · As of November 1, 2026
View at MOH London

About this 0.42ct lab-grown round diamond

This 0.42ct lab-grown round sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG459129634 or 459129634. Listed at 10 retailers as of November 1, 2026, with prices from $259 to $1,288, a $1,029 spread on the same certified stone. MOH London lists it at $1,288. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.42
Carat
F
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.4°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459129634
Dimensions4.77 × 4.79 × 2.96 mm
L/W Ratio1.00
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
4.77 mm4.79 mm0.42 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG459129634
Side View
Table 57.5%Crown 37.4°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 62.0%

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 1
Current: $1,288 USD|Low: $249 USD|High: $1,303 USD|Avg: $525 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 5$259 USD
Retailer 3$270 USD
Retailer 8$300 USD
Retailer 6$321 USD
Retailer 7$535 USD
Retailer 4$607 USD
Retailer 2$607 USD
MOH London$1,288 USD

43 data points across 8 retailers

10 retailers$259 USD to $1,288 USD

A
Cheapest Retailer
-
$259 USD
A
Retailer 2
-
$270 USD
View
B+
Retailer 3
-
$300 USD
View
B+
Retailer 4
-
$321 USD
View
Retailer 5
-
$321 USD
View
Price last confirmed 7 days ago
B
Retailer 6
-
$535 USD
View
B
Retailer 7
-
$607 USD
€578 EUR
View
B
Retailer 8
-
$607 USD
£478 GBP
View
B
Retailer 9
-
$1,033 USD
View
Most Expensive
B
MOH London
LG459129634 · Nov 1
$1,288 USD
£1,014 GBP
View
9 more retailers have this diamond
Prices start from $259 USDSave up to $1,029 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
0.42ct Round
$259 USD