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Cushion|Natural|GIA

1.55ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 5242011749

Certificate GIA 5242011749

Diamond specifications and retailer prices

From £2,280 GBP
HK$23,900 HKD
As of November 2, 2026
Save £2,793 GBP (55%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £5,073 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct natural cushion diamond

This 1.55ct natural cushion sits in the one-and-a-half to two 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 5242011749. Listed at 17 retailers as of November 1, 2026, with prices from £2,280 to £5,073, a £2,793 spread on the same certified stone. MOH London lists it at £5,073. 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

1.55
Carat
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5242011749
Dimensions8.26 × 6.15 × 4.03 mm
L/W Ratio1.34
Girdle conditionFaceted
Top View
8.26 mm6.15 mm1.55 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5242011749
Side View
Table 64.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 65.5%

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 2
Current: £5,073 GBP|Low: £2,242 GBP|High: £5,301 GBP|Avg: £3,104 GBP|-4.3%
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
Retailer 16
November 2, 2026
Retailer 10£2,280 GBP
Retailer 4£2,335 GBP
Retailer 15£2,405 GBP
Retailer 5£2,478 GBP
Retailer 13£2,577 GBP
Retailer 16£2,584 GBP
Retailer 7£2,694 GBP
Retailer 12£2,739 GBP
Retailer 2£2,780 GBP
Retailer 14£2,895 GBP
Retailer 9£3,166 GBP
Retailer 8£3,367 GBP
Retailer 11£3,487 GBP
Retailer 3£3,820 GBP
Retailer 6£4,803 GBP
MOH London£5,073 GBP

25 data points across 16 retailers

17 retailers£2,280 GBP to £5,073 GBP

A
Cheapest Retailer
-
£2,280 GBP
HK$23,900 HKD
A
Retailer 2
-
£2,335 GBP
$3,133 USD
View
A
Retailer 3
-
£2,405 GBP
$3,227 USD
View
A
Retailer 4
-
£2,478 GBP
$3,326 USD
View
A
Retailer 5
-
£2,577 GBP
$3,458 USD
View
Final sale: no returns
A
Retailer 6
-
£2,584 GBP
€3,302 EUR
View
A
Retailer 7
-
£2,694 GBP
$3,615 USD
View
A
Retailer 8
-
£2,739 GBP
$3,675 USD
View
A
Retailer 9
-
£2,780 GBP
$3,730 USD
View
A
Retailer 10
-
£2,895 GBP
View
A
Retailer 11
-
£3,036 GBP
A$6,268 AUD
View
A
Retailer 12
-
£3,166 GBP
$4,249 USD
View
Retailer 13
-
£3,367 GBP
A$6,951 AUD
View
Price last confirmed 23 days ago
A
Retailer 14
-
£3,487 GBP
€4,457 EUR
View
B+
Retailer 15
-
£3,820 GBP
ZAR 82,812 ZAR
View
Retailer 16
-
£4,803 GBP
$6,445 USD
View
Price last confirmed 9 days ago
Most Expensive
B+
MOH London
EDA8DE476 · Nov 1
£5,073 GBP
View
16 more retailers have this diamond
Prices start from £2,280 GBPSave up to £2,793 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
1.55ct Cushion
£2,280 GBP