Radiant|Lab Grown|IGI

4.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG804661327

Certificate IGI LG804661327

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: $34,887 USD at With Clarity
View at With Clarity

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 LG804661327 or 804661327. Listed at 13 retailers, with a 375% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle40.7°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804661327
Dimensions11.34 × 8.16 × 5.39 mm
L/W Ratio1.39
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
11.34 mm8.16 mm4.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804661327
Side View
Table 62.0%Crown 40.7°Girdle: Slightly ThickPavilion 33.9°Culet: NoneDepth 66.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 1
Current: $4,889 USD|Low: $4,889 USD|High: $34,887 USD|Avg: $13,962 USD|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
With Clarity
October 1, 2026
Retailer 1$4,889 USD
Retailer 12$5,536 USD
Retailer 3$7,431 USD
Retailer 9$7,736 USD
Retailer 8$8,123 USD
Retailer 4$8,486 USD
Retailer 11$10,764 USD
Retailer 6$11,611 USD
Retailer 5$12,836 USD
Retailer 7$16,911 USD
Retailer 10$22,149 USD
Retailer 2$23,230 USD
With Clarity$34,887 USD

34 data points across 13 retailers

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

B+
Cheapest Retailer
-
$4,889 USD
B+
Retailer 2
-
$5,536 USD
View
B+
Retailer 3
-
$7,431 USD
View
Price last confirmed 31 days ago
B+
Retailer 4
-
$7,736 USD
View
B+
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
-
$11,611 USD
View
B
Retailer 9
-
$12,836 USD
£10,107 GBP
View
B
Retailer 10
-
$16,911 USD
View
C
Retailer 11
-
$22,149 USD
View
C
Retailer 12
-
$23,230 USD
View
Most Expensive
C
With Clarity
804661327 · Aug 12
$34,887 USD
View
Price last confirmed 50 days ago
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.

B+
4.28ct Radiant
$4,889 USD