CaratHunter
Plans
Radiant|Lab Grown|IGI

6.44ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG754508216

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG754508216

Diamond specifications and retailer prices

From $27,490 USD
As of November 1, 2026
Save $23,063 USD (46%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $50,553 USD at Brilliance · As of November 1, 2026
View at Brilliance

About this 6.44ct lab-grown radiant diamond

This 6.44ct lab-grown radiant sits in the over five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754508216 or 754508216. Listed at 12 retailers as of November 1, 2026, with prices from $27,490 to $50,553, a $23,063 spread on the same certified stone. Brilliance lists it at $50,553. 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

6.44
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754508216
Dimensions13.39 × 9.30 × 6.09 mm
L/W Ratio1.44
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
13.39 mm9.30 mm6.44 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754508216
Side View
Table 62.0%Crown 40.2°Girdle: Slightly ThickPavilion 33.7°Culet: NoneDepth 65.5%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $50,553 USD|Low: $24,936 USD|High: $150,731 USD|Avg: $56,337 USD|-8.5%
Brilliance
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
November 1, 2026
Retailer 9$27,490 USD
Retailer 4$28,099 USD
Retailer 5$31,245 USD
Retailer 12$32,776 USD
Retailer 14$35,828 USD
Retailer 3$36,708 USD
Retailer 10$39,350 USD
Retailer 8$43,467 USD
Retailer 2$50,434 USD
Brilliance$50,553 USD
Retailer 7$68,938 USD
Retailer 6$85,181 USD
Retailer 13$113,344 USD
Retailer 11$150,731 USD

26 data points across 14 retailers

12 retailers$27,490 USD to $50,553 USD

B+
Cheapest Retailer
-
$27,490 USD
B+
Retailer 2
-
$32,776 USD
View
B+
Retailer 3
-
$35,828 USD
View
B+
Retailer 4
-
$36,708 USD
View
B+
Retailer 5
-
$39,350 USD
View
Retailer 6
-
$43,467 USD
£34,226 GBP
View
Price last confirmed 8 days ago
B
Retailer 7
-
$50,434 USD
£39,712 GBP
View
Most Expensive
B
Brilliance
D42112681 · Nov 1
$50,553 USD
View
7 more retailers have this diamond
Prices start from $27,490 USDSave up to $23,063 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. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
6.44ct Radiant
$27,490 USD