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Cushion|Lab Grown|IGI

1.00ct D SI1 Cushion Lab Grown Diamond

VG • D/SI1 • IGI LG750578543

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

Certificate IGI LG750578543

Diamond specifications and retailer prices

From €286 EUR
$321 USD
As of November 1, 2026
Save €177 EUR (38%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: €858 EUR at MOH London · As of October 25, 2026
View at MOH London

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG750578543 or 750578543. Listed at 7 retailers as of November 1, 2026, with a 62% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.6°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG750578543
Dimensions5.80 × 5.63 × 3.67 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizeNone
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
5.80 mm5.63 mm1.00 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG750578543
Side View
Table 60.0%Crown 37.6°Girdle: STK-THKPavilion 35.1°Culet: NoneDepth 65.2%

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: Nov 1
Current: €858 EUR|Low: €286 EUR|High: €858 EUR|Avg: €425 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7€286 EUR
Retailer 3€310 EUR
Retailer 2€321 EUR
Retailer 5€326 EUR
Retailer 6€345 EUR
Retailer 9€455 EUR
Retailer 4€464 EUR
Retailer 8€486 EUR
MOH London€858 EUR

11 data points across 9 retailers

7 retailers€286 EUR to €464 EUR

A
Cheapest Retailer
-
€286 EUR
$321 USD
A
Retailer 2
-
€310 EUR
View
A
Retailer 3
-
€321 EUR
£284 GBP
View
A
Retailer 4
-
€326 EUR
$366 USD
View
B+
Retailer 5
-
€345 EUR
£304 GBP
View
B+
Retailer 6
-
€464 EUR
$520 USD
View
Most Expensive
MOH London
LG750578543 · Oct 25
€858 EUR
£758 GBP
View
Price last confirmed 8 days ago
6 more retailers have this diamond
Prices start from €286 EURSave up to €177 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
1.00ct Cushion
€286 EUR