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Cushion|Natural|GIA

0.90ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 1543517429

Certificate GIA 1543517429

Diamond specifications and retailer prices

From £535 GBP
HK$5,600 HKD
As of October 31, 2026
Save £759 GBP (59%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,294 GBP at Moon Ocean · As of October 30, 2026
View at Moon Ocean

About this 0.9ct natural cushion diamond

This 0.9ct natural cushion sits in the just-under-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 1543517429. Listed at 18 retailers as of October 30, 2026, with prices from £535 to £1,294, a £759 spread on the same certified stone. Moon Ocean lists it at £1,294. 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

0.90
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Pavilion angle39.9°
OriginNatural
Grading LabGIA
CertificateGIA 1543517429
Dimensions5.80 × 5.57 × 3.69 mm
L/W Ratio1.04
Girdle conditionFaceted
Top View
5.80 mm5.57 mm0.90 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1543517429
Side View
Table 66.0%CrownGirdle: MED-VTKPavilion 39.9°Culet: NoneDepth 66.2%

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: Oct 31
Current: £1,294 GBP|Low: £525 GBP|High: £1,329 GBP|Avg: £858 GBP|-2.5%
Moon Ocean
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
October 31, 2026
Retailer 2£535 GBP
Retailer 16£618 GBP
Retailer 5£716 GBP
Retailer 14£733 GBP
Retailer 6£741 GBP
Retailer 10£784 GBP
Retailer 12£787 GBP
Retailer 8£807 GBP
Retailer 13£818 GBP
Retailer 7£866 GBP
Retailer 4£872 GBP
Retailer 9£944 GBP
Retailer 11£982 GBP
Retailer 3£1,105 GBP
Retailer 15£1,234 GBP
Moon Ocean£1,294 GBP

24 data points across 16 retailers

18 retailers£535 GBP to £1,294 GBP

A
Cheapest Retailer
-
£535 GBP
HK$5,600 HKD
A
Retailer 2
-
£618 GBP
$828 USD
View
Final sale: no returns
A
Retailer 3
-
£716 GBP
$960 USD
View
A
Retailer 4
-
£733 GBP
$982 USD
View
Retailer 5
-
£741 GBP
SGD 1,341 SGD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£784 GBP
View
B+
Retailer 7
-
£787 GBP
$1,055 USD
View
A
Retailer 8
-
£807 GBP
SGD 1,462 SGD
View
B+
Retailer 9
-
£818 GBP
$1,096 USD
View
B+
Retailer 10
-
£866 GBP
$1,161 USD
View
B+
Retailer 11
-
£872 GBP
$1,168 USD
View
B+
Retailer 12
-
£944 GBP
€1,205 EUR
View
B+
Retailer 13
-
£982 GBP
ZAR 21,251 ZAR
View
B+
Retailer 14
-
£994 GBP
A$2,048 AUD
View
Retailer 15
-
£1,025 GBP
A$2,113 AUD
View
Price last confirmed 27 days ago
Retailer 16
-
£1,105 GBP
$1,481 USD
View
Price last confirmed 7 days ago
Retailer 17
-
£1,234 GBP
View
Price last confirmed 10 days ago
Most Expensive
B
Moon Ocean
NVN-557560A9C-429 · Oct 30
£1,294 GBP
View
17 more retailers have this diamond
Prices start from £535 GBPSave up to £759 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
0.90ct Cushion
£535 GBP