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Cushion|Lab Grown|IGI

1.74ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG526288478

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG526288478

Diamond specifications and retailer prices

From €210 EUR
$234 USD
As of October 28, 2026
Save €1,775 EUR (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €1,986 EUR at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.74ct lab-grown cushion diamond

This 1.74ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG526288478 or 526288478. Listed at 15 retailers as of October 28, 2026, with prices from €210 to €1,986, a €1,775 spread on the same certified stone. Brilliant Earth lists it at €1,986. 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

1.74
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG526288478
Dimensions7.05 × 6.86 × 4.23 mm
L/W Ratio1.03
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
7.05 mm6.86 mm1.74 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG526288478
Side View
Table 62.0%Crown 35°Girdle: MED-STKPavilion 31.9°Culet: NoneDepth 61.7%

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 28
Current: €1,986 EUR|Low: €210 EUR|High: €1,986 EUR|Avg: €596 EUR
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 3€210 EUR
Retailer 11€234 EUR
Retailer 6€314 EUR
Retailer 5€382 EUR
Retailer 2€430 EUR
Retailer 4€475 EUR
Retailer 9€489 EUR
Retailer 12€538 EUR
Retailer 10€601 EUR
Retailer 7€938 EUR
Retailer 8€948 EUR
Brilliant Earth€1,986 EUR

42 data points across 12 retailers

15 retailers€210 EUR to €1,986 EUR

A
Cheapest Retailer
-
€210 EUR
$234 USD
Final sale: no returns
A
Retailer 2
-
€234 EUR
$260 USD
View
B+
Retailer 3
-
€314 EUR
$350 USD
View
A
Retailer 4
-
€382 EUR
View
A
Retailer 5
-
€430 EUR
£377 GBP
View
A
Retailer 6
-
€475 EUR
$528 USD
View
A
Retailer 7
-
€489 EUR
A$838 AUD
View
A
Retailer 8
-
€520 EUR
$579 USD
View
A
Retailer 9
-
€538 EUR
$599 USD
View
B+
Retailer 10
-
€601 EUR
$669 USD
View
B+
Retailer 11
-
€799 EUR
$889 USD
View
B+
Retailer 12
-
€938 EUR
£822 GBP
View
Retailer 13
-
€948 EUR
$1,055 USD
View
Price last confirmed 8 days ago
B
Retailer 14
-
€1,100 EUR
$1,225 USD
View
Most Expensive
B
Brilliant Earth
10788643A · Oct 29
€1,986 EUR
$2,210 USD
View
14 more retailers have this diamond
Prices start from €210 EURSave up to €1,775 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
1.74ct Cushion
€210 EUR