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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

GD • I/SI1 • GIA 1555054425

Certificate GIA 1555054425

Diamond specifications and retailer prices

From £2,495 GBP
As of November 6, 2026
Save £2,879 GBP (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £5,374 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct natural cushion diamond

This 1.5ct 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 1555054425. Listed at 21 retailers as of November 1, 2026, with prices from £2,495 to £5,374, a £2,879 spread on the same certified stone. MOH London lists it at £5,374. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.50
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1555054425
Dimensions7.45 × 5.73 × 4.17 mm
L/W Ratio1.30
Girdle conditionFaceted
Top View
7.45 mm5.73 mm1.50 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1555054425
Side View
Table 68.0%CrownGirdle: STK-VTKPavilionCulet: NDepth 72.8%

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 6
Current: £5,374 GBP|Low: £2,495 GBP|High: £5,518 GBP|Avg: £3,457 GBP|-2.6%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 17£2,495 GBP
Retailer 8£2,880 GBP
Retailer 16£2,893 GBP
Retailer 18£2,940 GBP
Retailer 9£2,954 GBP
Retailer 10£2,954 GBP
Retailer 3£3,044 GBP
Retailer 19£3,048 GBP
Retailer 7£3,113 GBP
Retailer 2£3,117 GBP
Retailer 13£3,178 GBP
Retailer 11£3,198 GBP
Retailer 6£3,326 GBP
Retailer 14£3,326 GBP
Retailer 5£3,620 GBP
Retailer 12£3,717 GBP
Retailer 15£4,030 GBP
Retailer 4£5,281 GBP
MOH London£5,374 GBP

20 data points across 19 retailers

21 retailers£2,495 GBP to £5,374 GBP

A
Cheapest Retailer
-
£2,495 GBP
B+
Retailer 2
-
£2,880 GBP
View
B+
Retailer 3
-
£2,893 GBP
View
B+
Retailer 4
-
£2,940 GBP
View
Retailer 5
-
£2,954 GBP
View
Price last confirmed 9 days ago
Retailer 6
-
£2,954 GBP
View
Price last confirmed 10 days ago
B+
Retailer 7
-
£3,044 GBP
View
B+
Retailer 8
-
£3,048 GBP
View
Final sale: no returns
B+
Retailer 9
-
£3,113 GBP
View
B+
Retailer 10
-
£3,117 GBP
View
B+
Retailer 11
-
£3,178 GBP
View
Retailer 12
-
£3,198 GBP
View
Price last confirmed 8 days ago
B+
Retailer 13
-
£3,326 GBP
View
B+
Retailer 14
-
£3,326 GBP
View
Retailer 15
-
£3,523 GBP
View
Price last confirmed 29 days ago
B+
Retailer 16
-
£3,582 GBP
View
B+
Retailer 17
-
£3,620 GBP
View
B+
Retailer 18
-
£3,717 GBP
View
B
Retailer 19
-
£4,030 GBP
View
B
Retailer 20
-
£5,281 GBP
View
Most Expensive
B
MOH London
CE8DDD0F8 · Nov 1
£5,374 GBP
View
20 more retailers have this diamond
Prices start from £2,495 GBPSave up to £2,879 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
£2,495 GBP