Radiant|Lab Grown|IGI

4.51ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG804659867

Certificate IGI LG804659867

Diamond specifications and retailer prices

From $8,266 USD
Save $23,970 USD (74%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $32,236 USD at With Clarity
View at With Clarity

About this 4.51ct lab-grown radiant diamond

This 4.51ct 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 LG804659867 or 804659867. Listed at 12 retailers, with prices from $8,266 to $32,236 at With Clarity, a $23,970 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

4.51
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.3°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804659867
Dimensions11.48 × 8.29 × 5.48 mm
L/W Ratio1.38
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
11.48 mm8.29 mm4.51 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804659867
Side View
Table 62.0%Crown 43.3°Girdle: MediumPavilion 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: $12,000 USD|Low: $5,420 USD|High: $31,591 USD|Avg: $15,632 USD|-7.0%
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 12$5,420 USD
Retailer 5$8,266 USD
Retailer 4$8,640 USD
Retailer 8$9,365 USD
Retailer 3$9,972 USD
Retailer 1$12,000 USD
Retailer 6$14,787 USD
Retailer 9$15,323 USD
Retailer 10$16,683 USD
Retailer 7$19,943 USD
Retailer 11$25,030 USD
Retailer 2$27,298 USD
With Clarity$31,591 USD

27 data points across 13 retailers

12 retailers$8,266 USD to $32,236 USD

B+
Cheapest Retailer
-
$8,266 USD
B+
Retailer 2
-
$8,640 USD
HK$67,500 HKD
View
B+
Retailer 3
-
$9,365 USD
£7,374 GBP
View
B+
Retailer 4
-
$9,972 USD
View
B+
Retailer 5
-
$12,000 USD
€11,429 EUR
View
B
Retailer 6
-
$14,787 USD
£11,643 GBP
View
B
Retailer 7
-
$15,323 USD
View
B
Retailer 8
-
$16,683 USD
ZAR 269,516 ZAR
View
B
Retailer 9
-
$19,943 USD
View
B
Retailer 10
-
$25,030 USD
View
C
Retailer 11
-
$27,298 USD
View
Most Expensive
C
With Clarity
804659867 · Sep 30
$32,236 USD
View
11 more retailers have this diamond
Prices start from $8,266 USDSave up to $23,970 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+
4.51ct Radiant
$8,266 USD