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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 €209 EUR
$234 USD
As of October 30, 2026
Save €1,035 EUR (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €1,244 EUR at Brilliant Earth · As of October 31, 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 30, 2026, with prices from €209 to €1,244, a €1,035 spread on the same certified stone. Brilliant Earth lists it at €1,244. 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
Color
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 30
Current: €1,244 EUR|Low: €209 EUR|High: €1,978 EUR|Avg: €595 EUR|-37.1%
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 31, 2026
Retailer 3€209 EUR
Retailer 11€233 EUR
Retailer 8€313 EUR
Retailer 2€377 EUR
Retailer 5€430 EUR
Retailer 4€473 EUR
Retailer 7€488 EUR
Retailer 12€536 EUR
Retailer 6€566 EUR
Retailer 9€934 EUR
Retailer 10€944 EUR
Brilliant Earth€1,244 EUR

42 data points across 12 retailers

15 retailers€209 EUR to €1,244 EUR

A
Cheapest Retailer
-
€209 EUR
$234 USD
Final sale: no returns
A
Retailer 2
-
€233 EUR
$260 USD
View
B+
Retailer 3
-
€313 EUR
$350 USD
View
A
Retailer 4
-
€377 EUR
View
A
Retailer 5
-
€430 EUR
£378 GBP
View
A
Retailer 6
-
€473 EUR
$528 USD
View
A
Retailer 7
-
€488 EUR
A$838 AUD
View
A
Retailer 8
-
€518 EUR
$579 USD
View
A
Retailer 9
-
€536 EUR
$599 USD
View
A
Retailer 10
-
€566 EUR
$632 USD
View
B+
Retailer 11
-
€796 EUR
$889 USD
View
B+
Retailer 12
-
€934 EUR
£822 GBP
View
Retailer 13
-
€944 EUR
$1,055 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
€1,096 EUR
$1,225 USD
View
Most Expensive
B
Brilliant Earth
10788643A · Oct 31
€1,244 EUR
$1,390 USD
View
14 more retailers have this diamond
Prices start from €209 EURSave up to €1,035 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
€209 EUR