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Cushion|Natural|GIA

1.30ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 3555596821

Certificate GIA 3555596821

Diamond specifications and retailer prices

From £2,878 GBP
As of November 5, 2026
Save £433 GBP (13%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £5,456 GBP at Queensmith · As of October 11, 2026
View at Queensmith

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 G 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 3555596821. Listed at 12 retailers as of November 5, 2026, with a relatively tight 15% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.30
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555596821
Dimensions7.51 × 5.51 × 3.76 mm
L/W Ratio1.36
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Indented Natural, Needle, Natural
Top View
7.51 mm5.51 mm1.30 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555596821
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £5,456 GBP|Low: £2,448 GBP|High: £5,456 GBP|Avg: £3,430 GBP|+0.4%
Queensmith
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
November 5, 2026
Retailer 3£2,448 GBP
Retailer 12£2,630 GBP
Retailer 8£2,765 GBP
Retailer 15£2,815 GBP
Retailer 2£2,878 GBP
Retailer 5£2,976 GBP
Retailer 4£2,977 GBP
Retailer 6£3,111 GBP
Retailer 14£3,268 GBP
Retailer 9£3,328 GBP
Retailer 7£3,378 GBP
Retailer 11£3,485 GBP
Retailer 10£3,683 GBP
Retailer 16£3,940 GBP
Retailer 13£5,253 GBP
Queensmith£5,456 GBP

22 data points across 16 retailers

12 retailers£2,878 GBP to £3,310 GBP

Retailer 1
-
£2,448 GBP
Price last confirmed 27 days ago
Retailer 2
-
£2,815 GBP
View
Price last confirmed 30 days ago
B+
Retailer 3
-
£2,878 GBP
View
B+
Retailer 4
-
£2,976 GBP
View
Retailer 5
-
£3,111 GBP
View
Price last confirmed 28 days ago
Retailer 6
-
£3,268 GBP
View
Price last confirmed 30 days ago
B+
Retailer 7
-
£3,310 GBP
View
Retailer 8
-
£3,378 GBP
View
Price last confirmed 29 days ago
Retailer 9
-
£3,485 GBP
View
Price last confirmed 29 days ago
Retailer 10
-
£3,940 GBP
View
Price last confirmed 38 days ago
Retailer 11
-
£5,253 GBP
View
Price last confirmed 30 days ago
Most Expensive
Queensmith
3555596821 · Oct 11
£5,456 GBP
View
Price last confirmed 26 days ago
11 more retailers have this diamond
Prices start from £2,878 GBPSave up to £433 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.

B+
1.30ct Cushion
£2,878 GBP