Radiant|Lab Grown|IGI

4.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG768629444

Certificate IGI LG768629444

Diamond specifications and retailer prices

From $4,889 USD
Save $18,341 USD (79%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $23,230 USD at Brilliant Earth
View at Brilliant Earth

About this 4.28ct lab-grown radiant diamond

This 4.28ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG768629444 or 768629444. Listed at 13 retailers, with prices from $4,889 to $23,230 at Brilliant Earth, a $18,341 spread on the same certified stone. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.9°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768629444
Dimensions11.32 × 8.18 × 5.42 mm
L/W Ratio1.38
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
11.32 mm8.18 mm4.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768629444
Side View
Table 63.0%Crown 39.9°Girdle: MED-STKPavilion 34.4°Culet: NoneDepth 66.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 1
Current: $23,230 USD|Low: $4,484 USD|High: $27,250 USD|Avg: $11,817 USD|-14.8%
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
October 1, 2026
Retailer 5$4,484 USD
Retailer 2$4,889 USD
Retailer 3$5,536 USD
Retailer 4$7,431 USD
Retailer 10$7,736 USD
Retailer 9$8,123 USD
Retailer 6$8,486 USD
Retailer 14$10,764 USD
Retailer 11$11,886 USD
Retailer 7$12,836 USD
Retailer 13$13,890 USD
Retailer 8$16,911 USD
Retailer 12$22,149 USD
Brilliant Earth$23,230 USD

34 data points across 14 retailers

13 retailers$4,889 USD to $23,230 USD

A
Cheapest Retailer
-
$4,889 USD
A
Retailer 2
-
$5,536 USD
View
A
Retailer 3
-
$7,431 USD
View
Price last confirmed 31 days ago
A
Retailer 4
-
$7,736 USD
View
A
Retailer 5
-
$8,123 USD
£6,396 GBP
View
B+
Retailer 6
-
$8,486 USD
HK$66,300 HKD
View
B+
Retailer 7
-
$10,764 USD
€10,251 EUR
View
B+
Retailer 8
-
$11,886 USD
View
B+
Retailer 9
-
$12,836 USD
£10,107 GBP
View
B
Retailer 10
-
$13,890 USD
ZAR 224,397 ZAR
View
B
Retailer 11
-
$16,911 USD
View
B
Retailer 12
-
$22,149 USD
View
Most Expensive
B
Brilliant Earth
19647320Y · Oct 1
$23,230 USD
View
12 more retailers have this diamond
Prices start from $4,889 USDSave up to $18,341 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.

A
4.28ct Radiant
$4,889 USD