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Cushion|Natural|GIA

1.00ct H SI1 Cushion Natural Diamond

ID • H/SI1 • GIA 1398673309

Certificate GIA 1398673309

Diamond specifications and retailer prices

From $2,332 AUD
HK$12,800 HKD
As of November 1, 2026
Save $3,167 AUD (58%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $5,500 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-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 1398673309. Listed at 15 retailers as of November 1, 2026, with prices from $2,332 to $5,500, a $3,167 spread on the same certified stone. MOH London lists it at $5,500. 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
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1398673309
Dimensions5.85 × 5.77 × 3.89 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Needle, Natural
Top View
5.85 mm5.77 mm1.00 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1398673309
Side View
Table 63.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 67.4%

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 1
Current: $5,500 AUD|Low: $2,314 AUD|High: $6,240 AUD|Avg: $3,595 AUD|-0.9%
MOH London
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
November 2, 2026
Retailer 8$2,332 AUD
Retailer 3$2,753 AUD
Retailer 11$2,897 AUD
Retailer 12$2,978 AUD
Retailer 7$3,062 AUD
Retailer 13$3,160 AUD
Retailer 4$3,289 AUD
Retailer 6$3,337 AUD
Retailer 2$3,416 AUD
Retailer 9$3,859 AUD
Retailer 14$3,861 AUD
Retailer 10$3,921 AUD
MOH London$5,500 AUD
Retailer 5$6,240 AUD

27 data points across 14 retailers

15 retailers$2,332 AUD to $5,500 AUD

A
Cheapest Retailer
-
$2,332 AUD
HK$12,800 HKD
B+
Retailer 2
-
$2,753 AUD
$1,934 USD
View
B+
Retailer 3
-
$2,836 AUD
$1,992 USD
View
B+
Retailer 4
-
$2,897 AUD
$2,035 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,978 AUD
$2,092 USD
View
B+
Retailer 6
-
$3,062 AUD
£1,694 GBP
View
B+
Retailer 7
-
$3,160 AUD
$2,220 USD
View
B+
Retailer 8
-
$3,244 AUD
SGD 3,079 SGD
View
B+
Retailer 9
-
$3,289 AUD
$2,310 USD
View
B+
Retailer 10
-
$3,337 AUD
$2,344 USD
View
B+
Retailer 11
-
$3,416 AUD
£1,890 GBP
View
B+
Retailer 12
-
$3,859 AUD
ZAR 43,791 ZAR
View
Retailer 13
-
$3,861 AUD
View
Price last confirmed 26 days ago
B+
Retailer 14
-
$3,921 AUD
€2,623 EUR
View
Most Expensive
B
MOH London
A64957593 · Nov 1
$5,500 AUD
£3,042 GBP
View
14 more retailers have this diamond
Prices start from $2,332 AUDSave up to $3,167 AUD

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
$2,332 AUD