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Cushion|Natural|GIA

1.50ct E SI1 Cushion Natural Diamond

ID • E/SI1 • GIA 2557438429

Certificate GIA 2557438429

Diamond specifications and retailer prices

From £3,633 GBP
HK$37,800 HKD
As of October 29, 2026
Save £3,920 GBP (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £7,553 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.5ct natural cushion diamond

This 1.5ct natural cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557438429. Listed at 19 retailers as of October 28, 2026, with prices from £3,633 to £7,553, a £3,920 spread on the same certified stone. Queensmith lists it at £7,553. 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

1.50
Carat
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557438429
Dimensions7.69 × 5.74 × 3.86 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
7.69 mm5.74 mm1.50 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557438429
Side View
Table 63.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 67.3%

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: £7,553 GBP|Low: £3,633 GBP|High: £7,615 GBP|Avg: £5,102 GBP|+1.8%
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
Retailer 16
October 29, 2026
Retailer 3£3,633 GBP
Retailer 9£3,925 GBP
Retailer 10£4,084 GBP
Retailer 4£4,258 GBP
Retailer 7£4,315 GBP
Retailer 13£4,487 GBP
Retailer 16£4,509 GBP
Retailer 15£4,509 GBP
Retailer 2£4,671 GBP
Retailer 8£4,796 GBP
Retailer 5£4,806 GBP
Retailer 6£5,004 GBP
Retailer 12£5,329 GBP
Retailer 14£5,948 GBP
Retailer 11£7,236 GBP
Queensmith£7,553 GBP

27 data points across 16 retailers

19 retailers£3,633 GBP to £7,553 GBP

A
Cheapest Retailer
-
£3,633 GBP
HK$37,800 HKD
A
Retailer 2
-
£3,925 GBP
₹497,815 INR
View
A
Retailer 3
-
£4,084 GBP
$5,439 USD
View
Retailer 4
-
£4,205 GBP
SGD 7,568 SGD
View
Price last confirmed 15 days ago
A
Retailer 5
-
£4,258 GBP
$5,670 USD
View
A
Retailer 6
-
£4,315 GBP
SGD 7,766 SGD
View
A
Retailer 7
-
£4,487 GBP
$5,975 USD
View
A
Retailer 8
-
£4,487 GBP
$5,975 USD
View
A
Retailer 9
-
£4,509 GBP
$6,004 USD
View
Final sale: no returns
A
Retailer 10
-
£4,509 GBP
$6,005 USD
View
A
Retailer 11
-
£4,671 GBP
View
B+
Retailer 12
-
£4,763 GBP
A$9,758 AUD
View
Retailer 13
-
£4,796 GBP
A$9,825 AUD
View
Price last confirmed 20 days ago
B+
Retailer 14
-
£4,806 GBP
$6,400 USD
View
B+
Retailer 15
-
£5,004 GBP
$6,663 USD
View
B+
Retailer 16
-
£5,329 GBP
€6,758 EUR
View
B+
Retailer 17
-
£5,948 GBP
ZAR 127,969 ZAR
View
B+
Retailer 18
-
£7,236 GBP
View
Most Expensive
B
Queensmith
2557438429 · Oct 28
£7,553 GBP
View
18 more retailers have this diamond
Prices start from £3,633 GBPSave up to £3,920 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
1.50ct Cushion
£3,633 GBP