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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 €836 EUR
HK$7,300 HKD
As of October 31, 2026
Save €3,487 EUR (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €4,323 EUR 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 €836 to €4,323, a €3,487 spread on the same certified stone. Brilliant Earth lists it at €4,323. 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

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: Oct 31
Current: €4,323 EUR|Low: €836 EUR|High: €4,332 EUR|Avg: €2,051 EUR|-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€836 EUR
Retailer 11€1,011 EUR
Retailer 12€1,025 EUR
Retailer 6€1,078 EUR
Retailer 7€1,108 EUR
Retailer 8€1,238 EUR
Retailer 10€1,725 EUR
Retailer 3€2,318 EUR
Retailer 4€2,345 EUR
Retailer 5€2,435 EUR
Retailer 13€2,547 EUR
Retailer 2€2,864 EUR
Brilliant Earth€4,323 EUR

33 data points across 13 retailers

13 retailers€836 EUR to €4,323 EUR

A
Cheapest Retailer
-
€836 EUR
HK$7,300 HKD
A
Retailer 2
-
€1,011 EUR
$1,130 USD
View
A
Retailer 3
-
€1,025 EUR
$1,145 USD
View
A
Retailer 4
-
€1,078 EUR
£948 GBP
View
A
Retailer 5
-
€1,108 EUR
View
Retailer 6
-
€1,238 EUR
ZAR 22,340 ZAR
View
Price last confirmed 8 days ago
B+
Retailer 7
-
€1,725 EUR
$1,927 USD
View
B
Retailer 8
-
€2,318 EUR
$2,590 USD
View
B
Retailer 9
-
€2,345 EUR
$2,620 USD
View
Retailer 10
-
€2,435 EUR
$2,720 USD
View
Price last confirmed 34 days ago
B
Retailer 11
-
€2,547 EUR
$2,846 USD
View
B
Retailer 12
-
€2,864 EUR
£2,519 GBP
View
Most Expensive
B
Brilliant Earth
21582219A · Oct 31
€4,323 EUR
$4,830 USD
View
12 more retailers have this diamond
Prices start from €836 EURSave up to €3,487 EUR

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
€836 EUR