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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 $1,931 USD
£1,520 GBP
As of October 30, 2026
Save $11,519 USD (86%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $13,450 USD 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 $1,931 to $13,450, a $11,519 spread on the same certified stone. Brilliant Earth lists it at $13,450. 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
Color
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: $13,450 USD|Low: $1,908 USD|High: $24,020 USD|Avg: $5,683 USD|-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 30, 2026
Retailer 2$1,931 USD
Retailer 13$1,944 USD
Retailer 4$2,115 USD
Retailer 14$2,352 USD
Retailer 7$2,925 USD
Retailer 3$3,421 USD
Retailer 12$3,531 USD
Retailer 16$3,702 USD
Retailer 9$3,803 USD
Retailer 10$4,019 USD
Retailer 5$5,191 USD
Retailer 6$5,461 USD
Retailer 11$6,140 USD
Retailer 17$6,761 USD
Retailer 8$11,018 USD
Retailer 15$13,370 USD
Brilliant Earth$13,450 USD

37 data points across 17 retailers

18 retailers$1,931 USD to $13,450 USD

A+
Cheapest Retailer
-
$1,931 USD
£1,520 GBP
A
Retailer 2
-
$1,944 USD
View
A
Retailer 3
-
$2,115 USD
View
A
Retailer 4
-
$2,352 USD
View
A
Retailer 5
-
$2,444 USD
View
Final sale: no returns
A
Retailer 6
-
$2,925 USD
View
A
Retailer 7
-
$3,421 USD
View
A
Retailer 8
-
$3,531 USD
View
A
Retailer 9
-
$3,702 USD
View
A
Retailer 10
-
$3,803 USD
View
A
Retailer 11
-
$4,019 USD
€3,828 EUR
View
A
Retailer 12
-
$5,191 USD
View
Retailer 13
-
$5,461 USD
A$8,401 AUD
View
Price last confirmed 8 days ago
B+
Retailer 14
-
$6,140 USD
View
B+
Retailer 15
-
$6,761 USD
£5,324 GBP
View
Retailer 16
-
$11,018 USD
A$16,951 AUD
View
Price last confirmed 21 days ago
B
Retailer 17
-
$13,370 USD
View
Most Expensive
B
Brilliant Earth
17187543Y · Oct 30
$13,450 USD
View
17 more retailers have this diamond
Prices start from $1,931 USDSave up to $11,519 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+
4.28ct Round
$1,931 USD