CaratHunter
Plans
Cushion|Natural|GIA

1.00ct H SI1 Cushion Natural Diamond

ID • H/SI1 • GIA 1398673309

Certificate GIA 1398673309

Diamond specifications and retailer prices

From £1,223 GBP
HK$12,800 HKD
As of November 1, 2026
Save £1,661 GBP (58%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,883 GBP 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 £1,223 to £2,883, a £1,661 spread on the same certified stone. MOH London lists it at £2,883. 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: £2,883 GBP|Low: £1,213 GBP|High: £3,272 GBP|Avg: £1,885 GBP|-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£1,223 GBP
Retailer 3£1,443 GBP
Retailer 11£1,519 GBP
Retailer 12£1,561 GBP
Retailer 2£1,605 GBP
Retailer 13£1,657 GBP
Retailer 4£1,724 GBP
Retailer 6£1,750 GBP
Retailer 7£1,791 GBP
Retailer 9£2,023 GBP
Retailer 14£2,024 GBP
Retailer 10£2,056 GBP
MOH London£2,883 GBP
Retailer 5£3,272 GBP

27 data points across 14 retailers

15 retailers£1,223 GBP to £2,883 GBP

A
Cheapest Retailer
-
£1,223 GBP
HK$12,800 HKD
B+
Retailer 2
-
£1,443 GBP
$1,934 USD
View
B+
Retailer 3
-
£1,487 GBP
$1,992 USD
View
B+
Retailer 4
-
£1,519 GBP
$2,035 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,561 GBP
$2,092 USD
View
B+
Retailer 6
-
£1,605 GBP
View
B+
Retailer 7
-
£1,657 GBP
$2,220 USD
View
B+
Retailer 8
-
£1,700 GBP
SGD 3,079 SGD
View
B+
Retailer 9
-
£1,724 GBP
$2,310 USD
View
B+
Retailer 10
-
£1,750 GBP
$2,344 USD
View
B+
Retailer 11
-
£1,791 GBP
View
B+
Retailer 12
-
£2,023 GBP
ZAR 43,791 ZAR
View
Retailer 13
-
£2,024 GBP
A$4,172 AUD
View
Price last confirmed 26 days ago
B+
Retailer 14
-
£2,056 GBP
€2,623 EUR
View
Most Expensive
B
MOH London
A64957593 · Nov 1
£2,883 GBP
View
14 more retailers have this diamond
Prices start from £1,223 GBPSave up to £1,661 GBP

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
£1,223 GBP