Radiant|Lab Grown|IGI

4.51ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG821638587

Certificate IGI LG821638587

Diamond specifications and retailer prices

From $6,199 USD
Save $32,641 USD (84%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $38,840 USD at Do Amore Diamonds
View at Do Amore Diamonds

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 LG821638587 or 821638587. Listed at 10 retailers, with prices from $6,199 to $38,840 at Do Amore Diamonds, a $32,641 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 angle45°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821638587
Dimensions11.55 × 8.13 × 5.51 mm
L/W Ratio1.42
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
11.55 mm8.13 mm4.51 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821638587
Side View
Table 67.0%Crown 45°Girdle: Slightly ThickPavilion 34.2°Culet: NoneDepth 67.8%

Caratlytics Score

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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: $38,840 USD|Low: $6,199 USD|High: $41,410 USD|Avg: $17,831 USD|-6.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 1, 2026
Retailer 6$6,199 USD
Retailer 5$6,550 USD
Retailer 3$8,364 USD
Retailer 7$8,980 USD
Retailer 10$9,156 USD
Retailer 2$11,822 USD
Retailer 4$14,627 USD
Retailer 8$25,030 USD
Retailer 9$34,866 USD
Do Amore Diamonds$38,840 USD

12 data points across 10 retailers

10 retailers$6,199 USD to $38,840 USD

A
Cheapest Retailer
-
$6,199 USD
A
Retailer 2
-
$6,550 USD
View
A
Retailer 3
-
$8,364 USD
View
A
Retailer 4
-
$8,980 USD
View
B+
Retailer 5
-
$9,156 USD
View
Price last confirmed 42 days ago
B+
Retailer 6
-
$11,822 USD
€11,259 EUR
View
B
Retailer 7
-
$14,627 USD
£11,517 GBP
View
B
Retailer 8
-
$25,030 USD
View
B
Retailer 9
-
$34,866 USD
View
Price last confirmed 44 days ago
Most Expensive
B
Do Amore Diamonds
27-AAA98CF92 · Sep 30
$38,840 USD
View
9 more retailers have this diamond
Prices start from $6,199 USDSave up to $32,641 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
4.51ct Radiant
$6,199 USD