CaratHunter
Plans
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 $5,592 NZD
£2,482 GBP
As of November 1, 2026
Save $8,810 NZD (61%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $14,401 NZD at Taylor and Hart · As of October 31, 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 31, 2026, with prices from $5,592 to $14,401, a $8,810 spread on the same certified stone. Taylor and Hart lists it at $14,401. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $11,754 NZD|Low: $4,815 NZD|High: $19,080 NZD|Avg: $8,370 NZD|-2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Taylor and Hart
November 1, 2026
Retailer 6$4,815 NZD
Retailer 2$5,592 NZD
Retailer 4$5,882 NZD
Retailer 3$6,403 NZD
Retailer 5$8,357 NZD
Retailer 1$11,754 NZD
Taylor and Hart$14,401 NZD

34 data points across 7 retailers

7 retailers$5,592 NZD to $14,401 NZD

Retailer 1
-
$4,815 NZD
HK$21,200 HKD
Price last confirmed 41 days ago
A
Retailer 2
-
$5,592 NZD
£2,482 GBP
View
A
Retailer 3
-
$5,882 NZD
$3,315 USD
View
A
Retailer 4
-
$6,403 NZD
€3,437 EUR
View
A
Retailer 5
-
$8,357 NZD
$4,710 USD
View
B+
Retailer 6
-
$11,754 NZD
£5,216 GBP
View
Most Expensive
B+
Taylor and Hart
76D2FDW · Oct 31
$14,401 NZD
$8,117 USD
View
6 more retailers have this diamond
Prices start from $5,592 NZDSave up to $8,810 NZD

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
$5,592 NZD