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Cushion|Natural|GIA

0.90ct J SI2 Cushion Natural Diamond

VG • J/SI2 • GIA 2504639189

Certificate GIA 2504639189

Diamond specifications and retailer prices

From £447 GBP
$599 USD
As of October 31, 2026
Save £811 GBP (64%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,258 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 SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2504639189. Listed at 10 retailers as of October 30, 2026, with prices from £447 to £1,258, a £811 spread on the same certified stone. Moon Ocean lists it at £1,258. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.90
Carat
J
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2504639189
Dimensions5.31 × 5.20 × 3.62 mm
L/W Ratio1.02
Top View
5.31 mm5.20 mm0.90 ctJ / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2504639189
Side View
Table 64.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 69.7%

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: £1,258 GBP|Low: £447 GBP|High: £1,474 GBP|Avg: £716 GBP|-14.3%
Moon Ocean
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 6£447 GBP
Retailer 7£489 GBP
Retailer 9£543 GBP
Retailer 4£556 GBP
Retailer 5£560 GBP
Retailer 10£570 GBP
Retailer 3£592 GBP
Retailer 2£712 GBP
Retailer 8£995 GBP
Moon Ocean£1,258 GBP

41 data points across 10 retailers

10 retailers£447 GBP to £1,258 GBP

A
Cheapest Retailer
-
£447 GBP
$599 USD
Final sale: no returns
A
Retailer 2
-
£489 GBP
$655 USD
View
Retailer 3
-
£543 GBP
$727 USD
View
Price last confirmed 23 days ago
A
Retailer 4
-
£556 GBP
$745 USD
View
A
Retailer 5
-
£560 GBP
$750 USD
View
Retailer 6
-
£570 GBP
$764 USD
View
Price last confirmed 26 days ago
A
Retailer 7
-
£592 GBP
View
A
Retailer 8
-
£712 GBP
€909 EUR
View
B+
Retailer 9
-
£995 GBP
View
Most Expensive
B
Moon Ocean
NVN-B680F9826-189 · Oct 30
£1,258 GBP
View
9 more retailers have this diamond
Prices start from £447 GBPSave up to £811 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
£447 GBP