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Cushion|Natural|GIA

1.30ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 1558124148

Certificate GIA 1558124148

Diamond specifications and retailer prices

From £2,075 GBP
As of November 6, 2026
Save £2,471 GBP (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £5,143 GBP at Queensmith · As of October 28, 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 1558124148. Listed at 18 retailers as of November 4, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1558124148
Dimensions7.19 × 5.54 × 3.82 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Indented Natural, Needle, Natural
Top View
7.19 mm5.54 mm1.30 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1558124148
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.8%

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 6
Current: £5,143 GBP|Low: £2,056 GBP|High: £5,252 GBP|Avg: £3,032 GBP|+0.5%
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
November 6, 2026
Retailer 4£2,075 GBP
Retailer 2£2,158 GBP
Retailer 7£2,472 GBP
Retailer 6£2,493 GBP
Retailer 3£2,516 GBP
Retailer 11£2,542 GBP
Retailer 5£2,649 GBP
Retailer 12£2,823 GBP
Retailer 14£2,834 GBP
Retailer 15£2,876 GBP
Retailer 9£2,889 GBP
Retailer 8£3,173 GBP
Retailer 10£3,327 GBP
Retailer 13£4,545 GBP
Queensmith£5,143 GBP

26 data points across 15 retailers

18 retailers£2,075 GBP to £4,545 GBP

A
Cheapest Retailer
-
£2,075 GBP
A
Retailer 2
-
£2,158 GBP
View
A
Retailer 3
-
£2,472 GBP
View
A
Retailer 4
-
£2,493 GBP
View
A
Retailer 5
-
£2,516 GBP
View
Final sale: no returns
A
Retailer 6
-
£2,542 GBP
View
A
Retailer 7
-
£2,649 GBP
View
B+
Retailer 8
-
£2,652 GBP
View
B+
Retailer 9
-
£2,823 GBP
View
B+
Retailer 10
-
£2,834 GBP
View
B+
Retailer 11
-
£2,876 GBP
View
B+
Retailer 12
-
£2,889 GBP
View
B+
Retailer 13
-
£2,985 GBP
View
Retailer 14
-
£3,095 GBP
View
Price last confirmed 30 days ago
B+
Retailer 15
-
£3,173 GBP
View
B+
Retailer 16
-
£3,327 GBP
View
B
Retailer 17
-
£4,545 GBP
View
Most Expensive
Queensmith
1558124148 · Oct 28
£5,143 GBP
View
Price last confirmed 9 days ago
17 more retailers have this diamond
Prices start from £2,075 GBPSave up to £2,471 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
£2,075 GBP