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Cushion|Lab Grown|IGI

1.59ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1

Diamond specifications and retailer prices

From HK$2,643 HKD
£265 GBP
As of November 1, 2026
Save HK$6,129 HKD (70%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: HK$8,771 HKD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.59ct lab-grown cushion diamond

This 1.59ct 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. Listed at 2 retailers as of October 31, 2026, with prices from HK$2,643 to HK$8,771, a HK$6,129 spread on the same certified stone. Blue Nile lists it at HK$8,771. 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

1.59
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions6.69 × 6.61 × 0.00 mm
L/W Ratio1.01
Top View
6.69 mm6.61 mm1.59 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 64.5%CrownGirdle: MED-STKPavilionCulet: NoneDepth 67.5%

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: Nov 1
Current: HK$8,771 HKD|Low: HK$932 HKD|High: HK$8,771 HKD|Avg: HK$3,954 HKD
Blue Nile
Retailer 2
Retailer 3
November 1, 2026
Retailer 3HK$932 HKD
Retailer 2HK$2,643 HKD
Blue NileHK$8,771 HKD

38 data points across 3 retailers

2 retailersHK$2,643 HKD to HK$8,771 HKD

A
Cheapest Retailer
-
HK$2,643 HKD
£265 GBP
Most Expensive
B
Blue Nile
21052784 · Oct 31
HK$8,771 HKD
$1,118 USD
View
1 more retailer has this diamond
Prices start from HK$2,643 HKDSave up to HK$6,129 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
1.59ct Cushion
HK$2,643 HKD