Radiant|Lab Grown|IGI

1.51ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG731569242

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

Certificate IGI LG731569242

Diamond specifications and retailer prices

From $247 USD
As of October 30, 2026
Save $2,583 USD (91%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,830 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG731569242 or 731569242. Listed at 17 retailers as of October 30, 2026, with prices from $247 to $2,830, a $2,583 spread on the same certified stone. Brilliant Earth lists it at $2,830. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.8°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731569242
Dimensions7.97 × 7.97 × 5.60 mm
L/W Ratio1.00
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
7.97 mm7.97 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731569242
Side View
Table 64.0%Crown 45.8°Girdle: Slightly ThickPavilion 35.9°Culet: NoneDepth 70.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $2,830 USD|Low: $247 USD|High: $3,260 USD|Avg: $1,080 USD|-13.2%
Brilliant Earth
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
Retailer 15
Retailer 16
Retailer 17
October 31, 2026
Retailer 12$247 USD
Retailer 4$286 USD
Retailer 9$315 USD
Retailer 13$466 USD
Retailer 6$500 USD
Retailer 16$513 USD
Retailer 2$565 USD
Retailer 11$785 USD
Retailer 7$792 USD
Retailer 15$987 USD
Retailer 3$993 USD
Retailer 17$1,085 USD
Retailer 10$1,360 USD
Retailer 8$1,637 USD
Retailer 14$2,370 USD
Retailer 5$2,475 USD
Brilliant Earth$2,830 USD

36 data points across 17 retailers

17 retailers$247 USD to $2,830 USD

A
Cheapest Retailer
-
$247 USD
A
Retailer 2
-
$286 USD
View
A
Retailer 3
-
$315 USD
View
Final sale: no returns
A
Retailer 4
-
$466 USD
View
Retailer 5
-
$500 USD
View
Price last confirmed 9 days ago
A
Retailer 6
-
$513 USD
View
A
Retailer 7
-
$565 USD
€538 EUR
View
A
Retailer 8
-
$785 USD
A$1,208 AUD
View
A
Retailer 9
-
$792 USD
View
B+
Retailer 10
-
$987 USD
View
A
Retailer 11
-
$993 USD
View
B+
Retailer 12
-
$1,085 USD
View
B+
Retailer 13
-
$1,360 USD
£1,071 GBP
View
Retailer 14
-
$1,637 USD
A$2,519 AUD
View
Price last confirmed 27 days ago
B
Retailer 15
-
$2,370 USD
View
B
Retailer 16
-
$2,475 USD
View
Most Expensive
B
Brilliant Earth
16112844Y · Oct 31
$2,830 USD
View
16 more retailers have this diamond
Prices start from $247 USDSave up to $2,583 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.

A
1.51ct Radiant
$247 USD