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Cushion|Natural|GIA

0.91ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1543879554

Certificate GIA 1543879554

Diamond specifications and retailer prices

From £549 GBP
HK$5,700 HKD
As of October 29, 2026
Save £619 GBP (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,340 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 0.91ct natural cushion diamond

This 0.91ct natural cushion sits in the just-under-one-carat band, graded I 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 1543879554. Listed at 16 retailers as of October 23, 2026, with a 113% 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

0.91
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle39.3°
OriginNatural
Grading LabGIA
CertificateGIA 1543879554
Dimensions5.66 × 5.57 × 3.71 mm
L/W Ratio1.02
Girdle conditionFaceted
Top View
5.66 mm5.57 mm0.91 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1543879554
Side View
Table 64.0%CrownGirdle: THK-VTKPavilion 39.3°Culet: NoneDepth 66.6%

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: Oct 29
Current: £1,340 GBP|Low: £549 GBP|High: £1,421 GBP|Avg: £904 GBP|-5.7%
MOH London
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
October 29, 2026
Retailer 13£549 GBP
Retailer 14£671 GBP
Retailer 8£734 GBP
Retailer 4£760 GBP
Retailer 12£766 GBP
Retailer 5£775 GBP
Retailer 10£811 GBP
Retailer 2£839 GBP
Retailer 6£898 GBP
Retailer 3£911 GBP
Retailer 9£1,021 GBP
Retailer 11£1,054 GBP
Retailer 7£1,124 GBP
Retailer 15£1,168 GBP
MOH London£1,340 GBP

25 data points across 15 retailers

16 retailers£549 GBP to £1,168 GBP

A
Cheapest Retailer
-
£549 GBP
HK$5,700 HKD
Retailer 2
-
£671 GBP
$892 USD
View
Final sale: no returns
A
Retailer 3
-
£734 GBP
€928 EUR
View
A
Retailer 4
-
£760 GBP
$1,010 USD
View
A
Retailer 5
-
£766 GBP
$1,018 USD
View
A
Retailer 6
-
£775 GBP
SGD 1,392 SGD
View
A
Retailer 7
-
£811 GBP
View
A
Retailer 8
-
£839 GBP
$1,115 USD
View
A
Retailer 9
-
£898 GBP
$1,193 USD
View
A
Retailer 10
-
£911 GBP
$1,210 USD
View
A
Retailer 11
-
£1,021 GBP
€1,292 EUR
View
B+
Retailer 12
-
£1,036 GBP
A$2,118 AUD
View
A
Retailer 13
-
£1,054 GBP
ZAR 22,616 ZAR
View
Price last confirmed 7 days ago
B+
Retailer 14
-
£1,124 GBP
A$2,297 AUD
View
Price last confirmed 25 days ago
B+
Retailer 15
-
£1,168 GBP
$1,552 USD
View
Most Expensive
B+
MOH London
E021B3282 · Oct 21
£1,340 GBP
View
Price last confirmed 8 days ago
15 more retailers have this diamond
Prices start from £549 GBPSave up to £619 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
0.91ct Cushion
£549 GBP