CaratHunter
Plans
Round|Lab Grown|IGI

4.28ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG744513762

Shape and cutting style on the report: Round brilliant

Certificate IGI LG744513762

Diamond specifications and retailer prices

From $3,425 NZD
£1,520 GBP
As of October 30, 2026
Save $20,439 NZD (86%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $23,864 NZD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4.28ct lab-grown round diamond

This 4.28ct 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 LG744513762 or 744513762. Listed at 18 retailers as of October 30, 2026, with prices from $3,425 to $23,864, a $20,439 spread on the same certified stone. Brilliant Earth lists it at $23,864. 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

4.28
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG744513762
Dimensions10.35 × 10.42 × 6.42 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS 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
10.35 mm10.42 mm4.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG744513762
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A+
Exceptional
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: Oct 30
Current: $23,864 NZD|Low: $3,385 NZD|High: $42,619 NZD|Avg: $10,135 NZD|-44.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 31, 2026
Retailer 10$3,425 NZD
Retailer 13$3,449 NZD
Retailer 4$3,753 NZD
Retailer 14$4,173 NZD
Retailer 7$5,190 NZD
Retailer 3$6,070 NZD
Retailer 12$6,265 NZD
Retailer 16$6,568 NZD
Retailer 9$6,748 NZD
Retailer 2$7,113 NZD
Retailer 5$9,210 NZD
Retailer 6$9,689 NZD
Retailer 11$10,894 NZD
Retailer 17$11,997 NZD
Retailer 8$19,550 NZD
Retailer 15$23,722 NZD
Brilliant Earth$23,864 NZD

38 data points across 17 retailers

18 retailers$3,425 NZD to $23,864 NZD

A+
Cheapest Retailer
-
$3,425 NZD
£1,520 GBP
A
Retailer 2
-
$3,449 NZD
$1,944 USD
View
A
Retailer 3
-
$3,753 NZD
$2,115 USD
View
A
Retailer 4
-
$4,173 NZD
$2,352 USD
View
A
Retailer 5
-
$4,336 NZD
$2,444 USD
View
Final sale: no returns
A
Retailer 6
-
$5,190 NZD
$2,925 USD
View
A
Retailer 7
-
$6,070 NZD
$3,421 USD
View
A
Retailer 8
-
$6,265 NZD
$3,531 USD
View
A
Retailer 9
-
$6,568 NZD
$3,702 USD
View
A
Retailer 10
-
$6,748 NZD
$3,803 USD
View
A
Retailer 11
-
$7,113 NZD
€3,818 EUR
View
A
Retailer 12
-
$9,210 NZD
$5,191 USD
View
Retailer 13
-
$9,689 NZD
A$8,401 AUD
View
Price last confirmed 9 days ago
B+
Retailer 14
-
$10,894 NZD
$6,140 USD
View
B+
Retailer 15
-
$11,997 NZD
£5,324 GBP
View
Retailer 16
-
$19,550 NZD
A$16,951 AUD
View
Price last confirmed 22 days ago
B
Retailer 17
-
$23,722 NZD
$13,370 USD
View
Most Expensive
B
Brilliant Earth
17187543Y · Oct 30
$23,864 NZD
$13,450 USD
View
17 more retailers have this diamond
Prices start from $3,425 NZDSave up to $20,439 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+
4.28ct Round
$3,425 NZD