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Cushion|Natural|GIA

1.50ct D SI2 Cushion Natural Diamond

GD • D/SI2 • GIA 6551664558

Certificate GIA 6551664558

Diamond specifications and retailer prices

From £3,000 GBP
HK$31,400 HKD
As of October 31, 2026
Save £3,815 GBP (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £6,815 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 D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6551664558. Listed at 15 retailers as of October 28, 2026, with prices from £3,000 to £6,815, a £3,815 spread on the same certified stone. Queensmith lists it at £6,815. 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
D
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551664558
Dimensions7.73 × 5.95 × 4.07 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle, Indented Natural
Top View
7.73 mm5.95 mm1.50 ctD / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551664558
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.4%

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 31
Current: £6,815 GBP|Low: £2,981 GBP|High: £6,862 GBP|Avg: £4,358 GBP|+1.7%
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
October 31, 2026
Retailer 6£3,000 GBP
Retailer 2£3,216 GBP
Retailer 5£3,539 GBP
Retailer 3£3,699 GBP
Retailer 9£3,787 GBP
Retailer 12£3,821 GBP
Retailer 8£3,910 GBP
Retailer 10£4,007 GBP
Retailer 4£4,122 GBP
Retailer 13£4,217 GBP
Retailer 7£4,535 GBP
Retailer 11£6,390 GBP
Queensmith£6,815 GBP

24 data points across 13 retailers

15 retailers£3,000 GBP to £6,815 GBP

A
Cheapest Retailer
-
£3,000 GBP
HK$31,400 HKD
A
Retailer 2
-
£3,216 GBP
₹410,417 INR
View
A
Retailer 3
-
£3,539 GBP
SGD 6,408 SGD
View
B+
Retailer 4
-
£3,679 GBP
$4,930 USD
View
B+
Retailer 5
-
£3,699 GBP
$4,956 USD
View
Final sale: no returns
A
Retailer 6
-
£3,787 GBP
View
B+
Retailer 7
-
£3,821 GBP
SGD 6,918 SGD
View
A
Retailer 8
-
£3,910 GBP
View
B+
Retailer 9
-
£4,007 GBP
$5,369 USD
View
B+
Retailer 10
-
£4,122 GBP
$5,522 USD
View
B+
Retailer 11
-
£4,217 GBP
$5,650 USD
View
B+
Retailer 12
-
£4,321 GBP
A$8,908 AUD
View
B+
Retailer 13
-
£4,535 GBP
€5,787 EUR
View
B
Retailer 14
-
£6,390 GBP
View
Most Expensive
B
Queensmith
6551664558 · Oct 28
£6,815 GBP
View
14 more retailers have this diamond
Prices start from £3,000 GBPSave up to £3,815 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
£3,000 GBP