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Cushion|Lab Grown|IGI

1.51ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG436046931

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436046931

Diamond specifications and retailer prices

From €752 EUR
$840 USD
As of October 31, 2026
Save €3,622 EUR (83%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €4,374 EUR at MOH London · As of October 29, 2026
View at MOH London

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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436046931 or 436046931. Listed at 6 retailers as of October 29, 2026, with prices from €752 to €4,374, a €3,622 spread on the same certified stone. MOH London lists it at €4,374. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436046931
Dimensions7.26 × 6.91 × 4.30 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.26 mm6.91 mm1.51 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436046931
Side View
Table 56.0%Crown 35.6°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.2%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: €4,374 EUR|Low: €752 EUR|High: €4,404 EUR|Avg: €2,094 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2€752 EUR
Retailer 5€1,308 EUR
Retailer 4€1,354 EUR
Retailer 6€1,508 EUR
Retailer 10€1,564 EUR
Retailer 9€1,670 EUR
Retailer 7€1,865 EUR
Retailer 3€2,142 EUR
Retailer 8€3,878 EUR
MOH London€4,374 EUR

9 data points across 10 retailers

6 retailers€752 EUR to €4,374 EUR

A
Cheapest Retailer
-
€752 EUR
$840 USD
B+
Retailer 2
-
€1,308 EUR
$1,461 USD
View
Final sale: no returns
Retailer 3
-
€1,354 EUR
$1,513 USD
View
Price last confirmed 19 days ago
B
Retailer 4
-
€1,508 EUR
$1,685 USD
View
B
Retailer 5
-
€2,142 EUR
$2,393 USD
View
Most Expensive
B
MOH London
LG436046931 · Oct 29
€4,374 EUR
£3,848 GBP
View
5 more retailers have this diamond
Prices start from €752 EURSave up to €3,622 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
€752 EUR