Cushion|Lab Grown|IGI

1.51ct D FL Cushion Lab Grown Diamond

GD • D/FL • IGI LG818683563

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818683563

Diamond specifications and retailer prices

From $934 USD
HK$7,300 HKD
As of October 31, 2026
Save $3,896 USD (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,830 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 standard cut grade and certified by IGI LG818683563 or 818683563. Listed at 13 retailers as of October 31, 2026, with prices from $934 to $4,830, a $3,896 spread on the same certified stone. Brilliant Earth lists it at $4,830. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
D
Color
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818683563
Dimensions7.82 × 6.10 × 3.95 mm
L/W Ratio1.28
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
7.82 mm6.10 mm1.51 ctD / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818683563
Side View
Table 61.0%Crown 36.4°Girdle: MED-STKPavilion 35.6°Culet: NoneDepth 64.8%

Caratlytics Score

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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: Oct 31
Current: $4,830 USD|Low: $934 USD|High: $4,840 USD|Avg: $2,291 USD|-0.2%
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
November 1, 2026
Retailer 9$934 USD
Retailer 11$1,130 USD
Retailer 12$1,145 USD
Retailer 6$1,204 USD
Retailer 7$1,238 USD
Retailer 8$1,383 USD
Retailer 10$1,927 USD
Retailer 3$2,590 USD
Retailer 4$2,620 USD
Retailer 5$2,720 USD
Retailer 13$2,846 USD
Retailer 2$3,199 USD
Brilliant Earth$4,830 USD

33 data points across 13 retailers

13 retailers$934 USD to $4,830 USD

A
Cheapest Retailer
-
$934 USD
HK$7,300 HKD
A
Retailer 2
-
$1,130 USD
View
A
Retailer 3
-
$1,145 USD
View
A
Retailer 4
-
$1,204 USD
£948 GBP
View
A
Retailer 5
-
$1,238 USD
€1,179 EUR
View
Retailer 6
-
$1,383 USD
ZAR 22,340 ZAR
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$1,927 USD
View
B
Retailer 8
-
$2,590 USD
View
B
Retailer 9
-
$2,620 USD
View
Retailer 10
-
$2,720 USD
View
Price last confirmed 34 days ago
B
Retailer 11
-
$2,846 USD
View
B
Retailer 12
-
$3,199 USD
£2,519 GBP
View
Most Expensive
B
Brilliant Earth
21582219A · Oct 31
$4,830 USD
View
12 more retailers have this diamond
Prices start from $934 USDSave up to $3,896 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
$934 USD