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Cushion|Lab Grown|IGI

1.71ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG523278356

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG523278356

Diamond specifications and retailer prices

From HK$1,820 HKD
$232 USD
As of October 30, 2026
Save HK$10,498 HKD (85%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: HK$12,318 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG523278356 or 523278356. Listed at 12 retailers as of October 29, 2026, with prices from HK$1,820 to HK$12,318, a HK$10,498 spread on the same certified stone. Brilliant Earth lists it at HK$12,318. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle30.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG523278356
Dimensions8.03 × 6.14 × 4.09 mm
L/W Ratio1.31
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
8.03 mm6.14 mm1.71 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG523278356
Side View
Table 60.5%Crown 35.4°Girdle: MED-THKPavilion 30.4°Culet: NoneDepth 66.6%

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 30
Current: HK$12,318 HKD|Low: HK$1,820 HKD|High: HK$12,945 HKD|Avg: HK$5,217 HKD|-4.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 8HK$1,820 HKD
Retailer 6HK$2,746 HKD
Retailer 4HK$3,320 HKD
Retailer 2HK$3,716 HKD
Retailer 9HK$4,132 HKD
Retailer 7HK$4,684 HKD
Retailer 3HK$4,943 HKD
Retailer 5HK$8,180 HKD
Brilliant EarthHK$12,318 HKD

43 data points across 9 retailers

12 retailersHK$1,820 HKD to HK$12,318 HKD

A
Cheapest Retailer
-
HK$1,820 HKD
$232 USD
Final sale: no returns
B+
Retailer 2
-
HK$2,746 HKD
$350 USD
View
A
Retailer 3
-
HK$3,320 HKD
€403 EUR
View
A
Retailer 4
-
HK$3,716 HKD
£373 GBP
View
A
Retailer 5
-
HK$4,132 HKD
$527 USD
View
A
Retailer 6
-
HK$4,684 HKD
$597 USD
View
B+
Retailer 7
-
HK$4,786 HKD
$610 USD
View
A
Retailer 8
-
HK$4,943 HKD
$630 USD
View
B+
Retailer 9
-
HK$6,945 HKD
$885 USD
View
B+
Retailer 10
-
HK$8,180 HKD
£821 GBP
View
B
Retailer 11
-
HK$9,583 HKD
$1,221 USD
View
Most Expensive
B
Brilliant Earth
10788544A · Oct 29
HK$12,318 HKD
$1,570 USD
View
11 more retailers have this diamond
Prices start from HK$1,820 HKDSave up to HK$10,498 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$1,820 HKD