Round|Lab Grown|IGI

4.20ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG807639396

Shape and cutting style on the report: Round brilliant

Certificate IGI LG807639396

Diamond specifications and retailer prices

From $3,159 USD
£2,487 GBP
As of October 28, 2026
Save $4,958 USD (61%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $8,117 USD at Taylor and Hart · As of October 27, 2026
View at Taylor and Hart

About this 4.2ct lab-grown round diamond

This 4.2ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG807639396 or 807639396. Listed at 7 retailers as of October 27, 2026, with prices from $3,159 to $8,117, a $4,958 spread on the same certified stone. Taylor and Hart lists it at $8,117. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.20
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG807639396
Dimensions10.44 × 10.40 × 6.35 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
10.44 mm10.40 mm4.20 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG807639396
Side View
Table 58.0%Crown 33.1°Girdle: MED-STKPavilion 41.1°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: Oct 28
Current: $6,660 USD|Low: $2,714 USD|High: $10,754 USD|Avg: $4,728 USD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Taylor and Hart
October 29, 2026
Retailer 6$2,714 USD
Retailer 3$3,159 USD
Retailer 4$3,315 USD
Retailer 2$3,618 USD
Retailer 5$4,710 USD
Retailer 1$6,660 USD
Taylor and Hart$8,117 USD

31 data points across 7 retailers

7 retailers$3,159 USD to $8,117 USD

A
Retailer 1
-
$2,714 USD
HK$21,200 HKD
Price last confirmed 38 days ago
A
Retailer 2
-
$3,159 USD
£2,487 GBP
View
A
Retailer 3
-
$3,315 USD
View
A
Retailer 4
-
$3,618 USD
€3,446 EUR
View
A
Retailer 5
-
$4,710 USD
View
B+
Retailer 6
-
$6,660 USD
£5,244 GBP
View
Most Expensive
B+
Taylor and Hart
76D2FDW · Oct 27
$8,117 USD
View
6 more retailers have this diamond
Prices start from $3,159 USDSave up to $4,958 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
4.20ct Round
$3,159 USD