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Cushion|Natural|GIA

1.30ct J SI2 Cushion Natural Diamond

J/SI2 • GIA 3565400574

Certificate GIA 3565400574

Diamond specifications and retailer prices

From £1,538 GBP
HK$16,100 HKD
As of November 1, 2026
Save £671 GBP (30%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,209 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.3ct natural cushion diamond

This 1.3ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included) and certified by GIA 3565400574. Listed at 7 retailers as of October 31, 2026, with prices from £1,538 to £2,209, a £671 spread on the same certified stone. Blue Nile lists it at £2,209. 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

1.30
Carat
J
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3565400574
Dimensions7.92 × 5.59 × 3.69 mm
L/W Ratio1.42
Top View
7.92 mm5.59 mm1.30 ctJ / SI2
OriginNatural
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3565400574
Side View
Table 62.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 66.1%

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: £2,209 GBP|Low: £1,528 GBP|High: £2,302 GBP|Avg: £1,845 GBP|-1.2%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 3£1,538 GBP
Retailer 2£1,554 GBP
Retailer 5£1,639 GBP
Retailer 7£1,791 GBP
Retailer 8£1,866 GBP
Retailer 6£1,959 GBP
Retailer 4£2,142 GBP
Blue Nile£2,209 GBP

30 data points across 8 retailers

7 retailers£1,538 GBP to £2,209 GBP

A
Cheapest Retailer
-
£1,538 GBP
HK$16,100 HKD
A
Retailer 2
-
£1,554 GBP
₹198,280 INR
View
B+
Retailer 3
-
£1,639 GBP
$2,196 USD
View
Final sale: no returns
B+
Retailer 4
-
£1,791 GBP
$2,400 USD
View
B+
Retailer 5
-
£1,959 GBP
$2,625 USD
View
B
Retailer 6
-
£2,142 GBP
SGD 3,878 SGD
View
Most Expensive
B
Blue Nile
30380811 · Oct 31
£2,209 GBP
$2,960 USD
View
6 more retailers have this diamond
Prices start from £1,538 GBPSave up to £671 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
1.30ct Cushion
£1,538 GBP