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Cushion|Lab Grown|IGI

1.71ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG766660227

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG766660227

Diamond specifications and retailer prices

From €417 EUR
As of October 31, 2026
Save €1,257 EUR (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €1,674 EUR at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.71ct lab-grown cushion diamond

This 1.71ct 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 LG766660227 or 766660227. Listed at 9 retailers as of October 30, 2026, with prices from €417 to €1,674, a €1,257 spread on the same certified stone. Brilliant Earth lists it at €1,674. 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

1.71
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle32.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766660227
Dimensions7.63 × 6.67 × 4.02 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.63 mm6.67 mm1.71 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766660227
Side View
Table 59.0%Crown 33.7°Girdle: MED-THKPavilion 32.3°Culet: NoneDepth 60.3%

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: €1,674 EUR|Low: €411 EUR|High: €1,996 EUR|Avg: €787 EUR|-16.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 2€417 EUR
Retailer 6€433 EUR
Retailer 3€476 EUR
Retailer 7€488 EUR
Retailer 8€510 EUR
Retailer 5€971 EUR
Retailer 4€1,025 EUR
Brilliant Earth€1,674 EUR

41 data points across 8 retailers

9 retailers€417 EUR to €1,674 EUR

A
Cheapest Retailer
-
€417 EUR
B+
Retailer 2
-
€433 EUR
$484 USD
View
A
Retailer 3
-
€476 EUR
£419 GBP
View
A
Retailer 4
-
€488 EUR
$545 USD
View
A
Retailer 5
-
€510 EUR
$570 USD
View
B+
Retailer 6
-
€865 EUR
$967 USD
View
Retailer 7
-
€971 EUR
$1,085 USD
View
Price last confirmed 13 days ago
B
Retailer 8
-
€1,025 EUR
£902 GBP
View
Most Expensive
B
Brilliant Earth
17710949A · Oct 30
€1,674 EUR
$1,870 USD
View
8 more retailers have this diamond
Prices start from €417 EURSave up to €1,257 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
1.71ct Cushion
€417 EUR