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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

ID • H/SI1 • GIA 6565025664

Certificate GIA 6565025664

Diamond specifications and retailer prices

From HK$22,697 HKD
As of November 1, 2026
Save HK$69,322 HKD (75%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$92,019 HKD at William & Sons Jewelers · As of November 2, 2026
View at William & Sons Jewelers

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565025664. Listed at 20 retailers as of November 1, 2026, with prices from HK$22,697 to HK$92,019, a HK$69,322 spread on the same certified stone. William & Sons Jewelers lists it at HK$92,019. 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

1.51
Carat
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle35.9°
OriginNatural
Grading LabGIA
CertificateGIA 6565025664
Dimensions6.77 × 6.44 × 4.39 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizeNone
Top View
6.77 mm6.44 mm1.51 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565025664
Side View
Table 64.0%Crown 33.2°Girdle: MED-THKPavilion 35.9°Culet: NDepth 68.1%

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$34,325 HKD|Low: HK$21,647 HKD|High: HK$115,738 HKD|Avg: HK$36,919 HKD|+13.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
William & Sons Jewelers
November 2, 2026
Retailer 15HK$22,697 HKD
Retailer 3HK$23,342 HKD
Retailer 7HK$23,380 HKD
Retailer 13HK$23,915 HKD
Retailer 12HK$24,135 HKD
Retailer 17HK$24,558 HKD
Retailer 10HK$26,371 HKD
Retailer 16HK$29,046 HKD
Retailer 18HK$30,678 HKD
Retailer 19HK$30,678 HKD
Retailer 2HK$31,698 HKD
Retailer 8HK$32,088 HKD
Retailer 1HK$34,325 HKD
Retailer 5HK$34,931 HKD
Retailer 6HK$35,333 HKD
Retailer 14HK$35,543 HKD
Retailer 11HK$36,121 HKD
Retailer 9HK$50,570 HKD
Retailer 4HK$90,662 HKD
William & Sons JewelersHK$92,019 HKD

26 data points across 20 retailers

20 retailersHK$22,697 HKD to HK$92,019 HKD

A
Cheapest Retailer
-
HK$22,697 HKD
A
Retailer 2
-
HK$23,342 HKD
$2,975 USD
View
A
Retailer 3
-
HK$23,915 HKD
$3,048 USD
View
A
Retailer 4
-
HK$24,135 HKD
$3,076 USD
View
A
Retailer 5
-
HK$24,558 HKD
$3,130 USD
View
Retailer 6
-
HK$26,371 HKD
$3,361 USD
View
Price last confirmed 25 days ago
Retailer 7
-
HK$28,200 HKD
SGD 4,857 SGD
View
Price last confirmed 24 days ago
A
Retailer 8
-
HK$29,046 HKD
$3,702 USD
View
A
Retailer 9
-
HK$30,678 HKD
$3,910 USD
View
A
Retailer 10
-
HK$30,678 HKD
$3,910 USD
View
Retailer 11
-
HK$31,384 HKD
$4,000 USD
View
Price last confirmed 25 days ago
A
Retailer 12
-
HK$31,698 HKD
$4,040 USD
View
Retailer 13
-
HK$32,088 HKD
A$6,292 AUD
View
Price last confirmed 24 days ago
A
Retailer 14
-
HK$33,497 HKD
A$6,568 AUD
View
B+
Retailer 15
-
HK$34,325 HKD
£3,445 GBP
View
A
Retailer 16
-
HK$35,543 HKD
$4,530 USD
View
Retailer 17
-
HK$36,121 HKD
ZAR 74,372 ZAR
View
Price last confirmed 33 days ago
Retailer 18
-
HK$50,570 HKD
£5,075 GBP
View
Price last confirmed 25 days ago
Retailer 19
-
HK$90,662 HKD
$11,555 USD
View
Price last confirmed 9 days ago
Most Expensive
C
William & Sons Jewelers
cert_6565025664 · Nov 2
HK$92,019 HKD
$11,728 USD
View
Final sale: no returns
19 more retailers have this diamond
Prices start from HK$22,697 HKDSave up to HK$69,322 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
1.51ct Cushion
HK$22,697 HKD