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Cushion|Lab Grown|IGI

3.50ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG852654640

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG852654640

Diamond specifications and retailer prices

From HK$6,904 HKD
$880 USD
As of October 30, 2026
Save HK$9,846 HKD (59%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: HK$16,751 HKD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 3.5ct lab-grown cushion diamond

This 3.5ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG852654640 or 852654640. Listed at 5 retailers as of October 30, 2026, with prices from HK$6,904 to HK$16,751, a HK$9,846 spread on the same certified stone. Taylor and Hart lists it at HK$16,751. 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

3.50
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle41.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG852654640
Dimensions8.79 × 7.99 × 5.73 mm
L/W Ratio1.10
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.79 mm7.99 mm3.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG852654640
Side View
Table 74.0%Crown 43.2°Girdle: STK-THKPavilion 41.7°Culet: NoneDepth 71.7%

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$7,998 HKD|Low: HK$6,904 HKD|High: HK$16,751 HKD|Avg: HK$11,122 HKD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Taylor and Hart
November 1, 2026
Retailer 4HK$6,904 HKD
Retailer 1HK$7,998 HKD
Retailer 2HK$8,081 HKD
Retailer 3HK$13,652 HKD
Taylor and HartHK$16,751 HKD

3 data points across 5 retailers

5 retailersHK$6,904 HKD to HK$16,751 HKD

B+
Cheapest Retailer
-
HK$6,904 HKD
$880 USD
A
Retailer 2
-
HK$7,998 HKD
£803 GBP
View
A
Retailer 3
-
HK$8,081 HKD
$1,030 USD
View
B+
Retailer 4
-
HK$13,652 HKD
$1,740 USD
View
Most Expensive
B
Taylor and Hart
RY30UBB · Oct 31
HK$16,751 HKD
$2,135 USD
View
4 more retailers have this diamond
Prices start from HK$6,904 HKDSave up to HK$9,846 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
3.50ct Cushion
HK$6,904 HKD