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Cushion|Natural|GIA

1.00ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1428718547

Certificate GIA 1428718547

Diamond specifications and retailer prices

From HK$8,025 HKD
As of November 6, 2026
Save HK$11,782 HKD (59%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$19,807 HKD at MOH London · As of November 4, 2026
View at MOH London

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded I 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 1428718547. Listed at 14 retailers as of November 4, 2026, with prices from HK$8,025 to HK$19,807, a HK$11,782 spread on the same certified stone. MOH London lists it at HK$19,807. 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

1.00
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1428718547
Dimensions5.22 × 5.22 × 4.14 mm
L/W Ratio1.00
Key to symbols
Crystal, Feather, Cloud, Needle, Indented Natural, Natural
Top View
5.22 mm5.22 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1428718547
Side View
Table 60.0%CrownGirdle: ThickPavilionCulet: NoneDepth 79.3%

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: Nov 6
Current: HK$19,807 HKD|Low: HK$8,025 HKD|High: HK$19,967 HKD|Avg: HK$12,572 HKD|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9HK$8,025 HKD
Retailer 10HK$10,353 HKD
Retailer 2HK$10,510 HKD
Retailer 8HK$10,839 HKD
Retailer 5HK$11,192 HKD
Retailer 3HK$11,678 HKD
Retailer 6HK$11,889 HKD
Retailer 7HK$13,230 HKD
Retailer 11HK$14,139 HKD
Retailer 4HK$15,032 HKD
MOH LondonHK$19,807 HKD

35 data points across 11 retailers

14 retailersHK$8,025 HKD to HK$19,807 HKD

A
Cheapest Retailer
-
HK$8,025 HKD
B+
Retailer 2
-
HK$10,048 HKD
View
Retailer 3
-
HK$10,142 HKD
View
Price last confirmed 59 days ago
B+
Retailer 4
-
HK$10,353 HKD
View
Final sale: no returns
A
Retailer 5
-
HK$10,510 HKD
View
Retailer 6
-
HK$10,839 HKD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
HK$11,192 HKD
View
B+
Retailer 8
-
HK$11,678 HKD
View
B+
Retailer 9
-
HK$11,858 HKD
View
B+
Retailer 10
-
HK$11,889 HKD
View
B+
Retailer 11
-
HK$13,230 HKD
View
Retailer 12
-
HK$14,139 HKD
View
Price last confirmed 33 days ago
B+
Retailer 13
-
HK$15,032 HKD
View
Most Expensive
B
MOH London
B3C613D10 · Nov 4
HK$19,807 HKD
£1,990 GBP
View
13 more retailers have this diamond
Prices start from HK$8,025 HKDSave up to HK$11,782 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
1.00ct Cushion
HK$8,025 HKD