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Cushion|Natural|GIA

2.50ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1559342221

Certificate GIA 1559342221

Diamond specifications and retailer prices

From £13,098 GBP
$17,577 USD
As of October 30, 2026
Save £9,111 GBP (41%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £22,209 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 2.5ct natural cushion diamond

This 2.5ct natural cushion sits in the two to three 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 1559342221. Listed at 12 retailers as of October 29, 2026, with prices from £13,098 to £22,209, a £9,111 spread on the same certified stone. MOH London lists it at £22,209. 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

2.50
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle35.89°
OriginNatural
Grading LabGIA
CertificateGIA 1559342221
Dimensions9.34 × 6.80 × 4.74 mm
L/W Ratio1.37
Key to symbols
Crystal, Feather, Needle
Top View
9.34 mm6.80 mm2.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1559342221
Side View
Table 63.0%CrownGirdle: STK-VTKPavilion 35.89°Culet: NoneDepth 69.7%

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 30
Current: £22,209 GBP|Low: £11,961 GBP|High: £23,292 GBP|Avg: £15,477 GBP|-4.6%
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
October 30, 2026
Retailer 13£11,961 GBP
Retailer 10£13,098 GBP
Retailer 2£13,250 GBP
Retailer 3£13,279 GBP
Retailer 11£13,499 GBP
Retailer 12£14,179 GBP
Retailer 8£15,925 GBP
Retailer 9£15,925 GBP
Retailer 4£15,949 GBP
Retailer 5£16,361 GBP
Retailer 7£16,454 GBP
Retailer 6£17,035 GBP
MOH London£22,209 GBP

21 data points across 13 retailers

12 retailers£13,098 GBP to £22,209 GBP

Retailer 1
-
£11,961 GBP
HK$125,400 HKD
Price last confirmed 38 days ago
A
Retailer 2
-
£13,098 GBP
$17,577 USD
View
Retailer 3
-
£13,250 GBP
€16,935 EUR
View
Price last confirmed 4 days ago
B+
Retailer 4
-
£13,499 GBP
$18,115 USD
View
B+
Retailer 5
-
£13,809 GBP
A$28,509 AUD
View
B+
Retailer 6
-
£14,179 GBP
$19,028 USD
View
Final sale: no returns
B+
Retailer 7
-
£15,925 GBP
$21,370 USD
View
B+
Retailer 8
-
£15,925 GBP
$21,370 USD
View
B+
Retailer 9
-
£15,949 GBP
A$32,928 AUD
View
B+
Retailer 10
-
£16,454 GBP
$22,080 USD
View
B+
Retailer 11
-
£17,035 GBP
€21,771 EUR
View
Most Expensive
B
MOH London
8640C0C1B · Oct 29
£22,209 GBP
View
11 more retailers have this diamond
Prices start from £13,098 GBPSave up to £9,111 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
2.50ct Cushion
£13,098 GBP