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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 HK$3,682 HKD
€447 EUR
As of October 29, 2026
Save HK$13,343 HKD (78%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$17,025 HKD at Brilliant Earth · As of October 29, 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 29, 2026, with prices from HK$3,682 to HK$17,025, a HK$13,343 spread on the same certified stone. Brilliant Earth lists it at HK$17,025. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: HK$17,025 HKD|Low: HK$3,601 HKD|High: HK$17,496 HKD|Avg: HK$6,991 HKD|-2.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 3HK$3,682 HKD
Retailer 6HK$3,797 HKD
Retailer 2HK$4,203 HKD
Retailer 7HK$4,276 HKD
Retailer 8HK$4,472 HKD
Retailer 9HK$7,585 HKD
Retailer 5HK$8,513 HKD
Retailer 4HK$8,988 HKD
Brilliant EarthHK$17,025 HKD

42 data points across 9 retailers

9 retailersHK$3,682 HKD to HK$17,025 HKD

A
Cheapest Retailer
-
HK$3,682 HKD
€447 EUR
B+
Retailer 2
-
HK$3,797 HKD
$484 USD
View
A
Retailer 3
-
HK$4,203 HKD
£422 GBP
View
A
Retailer 4
-
HK$4,276 HKD
$545 USD
View
A
Retailer 5
-
HK$4,472 HKD
$570 USD
View
B+
Retailer 6
-
HK$7,585 HKD
$967 USD
View
Retailer 7
-
HK$8,513 HKD
$1,085 USD
View
Price last confirmed 11 days ago
B
Retailer 8
-
HK$8,988 HKD
£902 GBP
View
Most Expensive
B
Brilliant Earth
17710949A · Oct 29
HK$17,025 HKD
$2,170 USD
View
8 more retailers have this diamond
Prices start from HK$3,682 HKDSave up to HK$13,343 HKD

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
HK$3,682 HKD