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Cushion|Natural|GIA

1.30ct F SI1 Cushion Natural Diamond

GD • F/SI1 • GIA 5536923851

Certificate GIA 5536923851

Diamond specifications and retailer prices

From £1,564 GBP
HK$16,400 HKD
As of November 1, 2026
Save £1,379 GBP (47%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,944 GBP at With Clarity · As of October 30, 2026
View at With Clarity

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 F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5536923851. Listed at 8 retailers as of October 30, 2026, with prices from £1,564 to £2,944, a £1,379 spread on the same certified stone. With Clarity lists it at £2,944. 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
F
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 5536923851
Dimensions6.34 × 6.32 × 4.25 mm
L/W Ratio1.00
Top View
6.34 mm6.32 mm1.30 ctF / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5536923851
Side View
Table 63.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 67.2%

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: Nov 1
Current: £1,564 GBP|Low: £1,555 GBP|High: £3,048 GBP|Avg: £2,250 GBP|-10.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
With Clarity
October 31, 2026
Retailer 1£1,564 GBP
Retailer 4£1,879 GBP
Retailer 7£1,898 GBP
Retailer 2£1,958 GBP
Retailer 6£2,177 GBP
Retailer 3£2,243 GBP
Retailer 5£2,265 GBP
Retailer 9£2,572 GBP
Retailer 8£2,604 GBP
With Clarity£2,944 GBP

14 data points across 10 retailers

8 retailers£1,564 GBP to £2,944 GBP

A
Cheapest Retailer
-
£1,564 GBP
HK$16,400 HKD
A
Retailer 2
-
£1,879 GBP
SGD 3,407 SGD
View
A
Retailer 3
-
£1,898 GBP
$2,547 USD
View
B+
Retailer 4
-
£1,958 GBP
$2,627 USD
View
Final sale: no returns
B+
Retailer 5
-
£2,177 GBP
SGD 3,947 SGD
View
B+
Retailer 6
-
£2,243 GBP
$3,010 USD
View
B+
Retailer 7
-
£2,265 GBP
$3,039 USD
View
Most Expensive
B+
With Clarity
5536923851 · Oct 30
£2,944 GBP
$3,950 USD
View
7 more retailers have this diamond
Prices start from £1,564 GBPSave up to £1,379 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
£1,564 GBP