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Cushion|Natural|GIA

1.00ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 1437577148

Certificate GIA 1437577148

Diamond specifications and retailer prices

From HK$13,049 HKD
As of November 5, 2026
Save HK$15,557 HKD (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$28,606 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 J 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 1437577148. Listed at 19 retailers as of November 4, 2026, with prices from HK$13,049 to HK$28,606, a HK$15,557 spread on the same certified stone. MOH London lists it at HK$28,606. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1437577148
Dimensions6.29 × 5.26 × 3.55 mm
L/W Ratio1.20
Culet sizeNone
Key to symbols
Feather, Crystal, Knot, Cavity, Indented Natural, Needle, Natural
Top View
6.29 mm5.26 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1437577148
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: HK$28,606 HKD|Low: HK$12,673 HKD|High: HK$28,835 HKD|Avg: HK$17,886 HKD|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5HK$13,096 HKD
Retailer 7HK$13,692 HKD
Retailer 9HK$13,833 HKD
Retailer 6HK$14,828 HKD
Retailer 2HK$15,879 HKD
Retailer 4HK$19,978 HKD
Retailer 8HK$20,181 HKD
Retailer 3HK$22,235 HKD
MOH LondonHK$28,606 HKD

38 data points across 9 retailers

19 retailersHK$13,049 HKD to HK$28,606 HKD

B+
Cheapest Retailer
-
HK$13,049 HKD
B+
Retailer 2
-
HK$13,096 HKD
View
B+
Retailer 3
-
HK$13,520 HKD
View
B+
Retailer 4
-
HK$13,692 HKD
View
Final sale: no returns
Retailer 5
-
HK$13,833 HKD
View
Price last confirmed 10 days ago
B+
Retailer 6
-
HK$13,872 HKD
View
B+
Retailer 7
-
HK$13,872 HKD
View
B+
Retailer 8
-
HK$14,311 HKD
View
B+
Retailer 9
-
HK$14,342 HKD
View
Retailer 10
-
HK$14,828 HKD
View
Price last confirmed 9 days ago
B
Retailer 11
-
HK$15,205 HKD
View
B
Retailer 12
-
HK$15,338 HKD
View
B+
Retailer 13
-
HK$15,879 HKD
View
B
Retailer 14
-
HK$17,501 HKD
View
B
Retailer 15
-
HK$17,940 HKD
View
B
Retailer 16
-
HK$19,978 HKD
View
Retailer 17
-
HK$20,181 HKD
View
Price last confirmed 33 days ago
B
Retailer 18
-
HK$22,235 HKD
View
Most Expensive
B
MOH London
C3CD0076E · Nov 4
HK$28,606 HKD
£2,874 GBP
View
18 more retailers have this diamond
Prices start from HK$13,049 HKDSave up to HK$15,557 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.

B+
1.00ct Cushion
HK$13,049 HKD