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Cushion|Lab Grown|IGI

1.51ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG799671514

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG799671514

Diamond specifications and retailer prices

From $851 USD
As of November 2, 2026
Save $3,029 USD (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,880 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG799671514 or 799671514. Listed at 12 retailers as of October 31, 2026, with prices from $851 to $3,880, a $3,029 spread on the same certified stone. Brilliant Earth lists it at $3,880. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799671514
Dimensions7.65 × 6.14 × 4.04 mm
L/W Ratio1.25
Girdle conditionFaceted
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
7.65 mm6.14 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799671514
Side View
Table 61.0%Crown 37.9°Girdle: MED-THKPavilion 34.9°Culet: NoneDepth 65.8%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: $3,880 USD|Low: $851 USD|High: $4,930 USD|Avg: $2,274 USD|-21.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 12$851 USD
Retailer 9$946 USD
Retailer 7$998 USD
Retailer 3$1,145 USD
Retailer 2$1,214 USD
Retailer 5$1,238 USD
Retailer 11$1,927 USD
Retailer 8$2,650 USD
Retailer 4$2,735 USD
Retailer 6$3,203 USD
Retailer 10$3,287 USD
Brilliant Earth$3,880 USD

41 data points across 12 retailers

12 retailers$851 USD to $3,880 USD

A
Cheapest Retailer
-
$851 USD
A
Retailer 2
-
$946 USD
View
A
Retailer 3
-
$998 USD
HK$7,800 HKD
View
A
Retailer 4
-
$1,145 USD
View
A
Retailer 5
-
$1,214 USD
£956 GBP
View
A
Retailer 6
-
$1,238 USD
€1,179 EUR
View
B+
Retailer 7
-
$1,927 USD
View
Retailer 8
-
$2,650 USD
View
Price last confirmed 11 days ago
B
Retailer 9
-
$2,735 USD
View
Retailer 10
-
$3,203 USD
£2,522 GBP
View
Price last confirmed 8 days ago
B
Retailer 11
-
$3,287 USD
View
Most Expensive
B
Brilliant Earth
20869975Y · Oct 31
$3,880 USD
View
11 more retailers have this diamond
Prices start from $851 USDSave up to $3,029 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 Cushion
$851 USD