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Cushion|Natural|GIA

1.03ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 1557684831

Certificate GIA 1557684831

Diamond specifications and retailer prices

From £1,091 GBP
As of November 4, 2026
Save £284 GBP (21%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,375 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.03ct natural cushion diamond

This 1.03ct natural cushion sits in the classic one-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 1557684831. Listed at 7 retailers as of November 4, 2026, with prices from £1,091 to £1,375, a £284 spread on the same certified stone. Blue Nile lists it at £1,375. 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

1.03
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1557684831
Dimensions5.68 × 5.55 × 3.76 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather
Top View
5.68 mm5.55 mm1.03 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1557684831
Side View
Table 62.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,375 GBP|Low: £976 GBP|High: £1,445 GBP|Avg: £1,232 GBP|-4.9%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 3£1,091 GBP
Retailer 4£1,139 GBP
Retailer 6£1,141 GBP
Retailer 2£1,248 GBP
Retailer 7£1,286 GBP
Retailer 5£1,303 GBP
Blue Nile£1,375 GBP

39 data points across 7 retailers

7 retailers£1,091 GBP to £1,375 GBP

A
Cheapest Retailer
-
£1,091 GBP
A
Retailer 2
-
£1,139 GBP
View
A
Retailer 3
-
£1,141 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,248 GBP
View
A
Retailer 5
-
£1,286 GBP
View
A
Retailer 6
-
£1,303 GBP
View
Most Expensive
A
Blue Nile
29608078 · Nov 5
£1,375 GBP
$1,840 USD
View
6 more retailers have this diamond
Prices start from £1,091 GBPSave up to £284 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
1.03ct Cushion
£1,091 GBP