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Radiant|Lab Grown|IGI

4.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG768629831

Certificate IGI LG768629831

Diamond specifications and retailer prices

From $6,070 USD
Save $29,529 USD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $35,599 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 LG768629831 or 768629831. Listed at 13 retailers, with prices from $6,070 to $35,599 at With Clarity, a $29,529 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 angle42.2°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768629831
Dimensions11.43 × 8.17 × 5.36 mm
L/W Ratio1.40
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
11.43 mm8.17 mm4.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768629831
Side View
Table 62.0%Crown 42.2°Girdle: Slightly ThickPavilion 33.9°Culet: NoneDepth 65.6%

Caratlytics Score

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

Price History

Last verified: Sep 30
Current: $6,682 USD|Low: $4,484 USD|High: $34,887 USD|Avg: $14,255 USD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
With Clarity
October 1, 2026
Retailer 4$4,484 USD
Retailer 2$6,070 USD
Retailer 1$6,682 USD
Retailer 9$7,736 USD
Retailer 8$8,123 USD
Retailer 5$8,422 USD
Retailer 13$10,764 USD
Retailer 6$12,836 USD
Retailer 10$13,120 USD
Retailer 12$13,890 USD
Retailer 7$16,911 USD
Retailer 11$22,149 USD
Retailer 3$23,230 USD
With Clarity$34,887 USD

34 data points across 14 retailers

13 retailers$6,070 USD to $35,599 USD

A
Cheapest Retailer
-
$6,070 USD
A
Retailer 2
-
$6,682 USD
View
A
Retailer 3
-
$7,736 USD
View
A
Retailer 4
-
$8,123 USD
£6,396 GBP
View
B+
Retailer 5
-
$8,422 USD
HK$65,800 HKD
View
B+
Retailer 6
-
$10,764 USD
€10,251 EUR
View
B+
Retailer 7
-
$12,836 USD
£10,107 GBP
View
B+
Retailer 8
-
$13,120 USD
View
B+
Retailer 9
-
$13,890 USD
ZAR 224,397 ZAR
View
B
Retailer 10
-
$16,911 USD
View
B
Retailer 11
-
$22,149 USD
View
B
Retailer 12
-
$23,230 USD
View
Most Expensive
B
With Clarity
768629831 · Sep 30
$35,599 USD
View
12 more retailers have this diamond
Prices start from $6,070 USDSave up to $29,529 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
$6,070 USD