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Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

VG • E/IF • IGI LG638415688

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG638415688

Diamond specifications and retailer prices

From €589 EUR
$658 USD
As of October 31, 2026
Save €2,311 EUR (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €2,900 EUR at Brilliant Earth · As of October 30, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG638415688 or 638415688. Listed at 19 retailers as of October 30, 2026, with prices from €589 to €2,900, a €2,311 spread on the same certified stone. Brilliant Earth lists it at €2,900. 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
E
Color
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG638415688
Dimensions6.67 × 6.60 × 4.47 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.67 mm6.60 mm1.51 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG638415688
Side View
Table 60.0%Crown 36.5°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 67.7%

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: €2,900 EUR|Low: €589 EUR|High: €2,936 EUR|Avg: €1,454 EUR|-1.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 6€589 EUR
Retailer 3€653 EUR
Retailer 11€752 EUR
Retailer 4€841 EUR
Retailer 2€1,011 EUR
Retailer 5€1,088 EUR
Retailer 9€1,121 EUR
Retailer 7€1,519 EUR
Retailer 12€1,973 EUR
Retailer 10€2,184 EUR
Retailer 8€2,846 EUR
Brilliant Earth€2,900 EUR

42 data points across 12 retailers

19 retailers€589 EUR to €2,900 EUR

A
Cheapest Retailer
-
€589 EUR
$658 USD
Final sale: no returns
Retailer 2
-
€653 EUR
$729 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
€752 EUR
$840 USD
View
A
Retailer 4
-
€841 EUR
$940 USD
View
A
Retailer 5
-
€873 EUR
$975 USD
View
A
Retailer 6
-
€998 EUR
$1,115 USD
View
A
Retailer 7
-
€1,011 EUR
£889 GBP
View
A
Retailer 8
-
€1,088 EUR
View
A
Retailer 9
-
€1,121 EUR
ZAR 20,230 ZAR
View
B+
Retailer 10
-
€1,519 EUR
A$2,611 AUD
View
B
Retailer 11
-
€1,896 EUR
£1,668 GBP
View
B
Retailer 12
-
€1,973 EUR
$2,204 USD
View
B
Retailer 13
-
€2,081 EUR
$2,325 USD
View
B
Retailer 14
-
€2,111 EUR
$2,358 USD
View
B
Retailer 15
-
€2,152 EUR
$2,404 USD
View
Retailer 16
-
€2,184 EUR
$2,440 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
€2,596 EUR
$2,900 USD
View
B
Retailer 18
-
€2,846 EUR
£2,504 GBP
View
Most Expensive
B
Brilliant Earth
12444282A · Oct 30
€2,900 EUR
$3,240 USD
View
18 more retailers have this diamond
Prices start from €589 EURSave up to €2,311 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
€589 EUR