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Cushion|Natural|GIA

1.50ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1543520312

Certificate GIA 1543520312

Diamond specifications and retailer prices

From £1,405 GBP
As of November 6, 2026
Save £1,810 GBP (56%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,216 GBP at MOH London · As of November 4, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1543520312. Listed at 14 retailers as of November 4, 2026, with prices from £1,405 to £3,216, a £1,810 spread on the same certified stone. MOH London lists it at £3,216. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle37.5°
OriginNatural
Grading LabGIA
CertificateGIA 1543520312
Dimensions7.45 × 6.07 × 4.17 mm
L/W Ratio1.23
Girdle conditionFaceted
Top View
7.45 mm6.07 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1543520312
Side View
Table 64.0%CrownGirdle: MED-THKPavilion 37.5°Culet: NoneDepth 68.8%

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: £3,216 GBP|Low: £1,387 GBP|High: £3,588 GBP|Avg: £2,238 GBP|-10.4%
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
November 6, 2026
Retailer 13£1,405 GBP
Retailer 10£1,698 GBP
Retailer 11£1,783 GBP
Retailer 5£1,830 GBP
Retailer 9£1,947 GBP
Retailer 3£1,955 GBP
Retailer 6£1,958 GBP
Retailer 4£2,219 GBP
Retailer 7£2,246 GBP
Retailer 2£2,285 GBP
Retailer 8£2,343 GBP
Retailer 12£3,004 GBP
MOH London£3,216 GBP

33 data points across 13 retailers

14 retailers£1,405 GBP to £3,216 GBP

A
Cheapest Retailer
-
£1,405 GBP
A
Retailer 2
-
£1,698 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,783 GBP
View
A
Retailer 4
-
£1,830 GBP
View
A
Retailer 5
-
£1,947 GBP
View
A
Retailer 6
-
£1,955 GBP
View
A
Retailer 7
-
£1,958 GBP
View
A
Retailer 8
-
£2,135 GBP
View
A
Retailer 9
-
£2,219 GBP
View
A
Retailer 10
-
£2,246 GBP
View
A
Retailer 11
-
£2,285 GBP
View
A
Retailer 12
-
£2,343 GBP
View
B+
Retailer 13
-
£3,004 GBP
View
Most Expensive
B+
MOH London
53B5DEFF3 · Nov 4
£3,216 GBP
View
13 more retailers have this diamond
Prices start from £1,405 GBPSave up to £1,810 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
£1,405 GBP