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Cushion|Natural|GIA

1.50ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 1553672759

Certificate GIA 1553672759

Diamond specifications and retailer prices

From £3,879 GBP
HK$40,600 HKD
As of October 31, 2026
Save £3,889 GBP (50%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £7,768 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553672759. Listed at 19 retailers as of October 28, 2026, with prices from £3,879 to £7,768, a £3,889 spread on the same certified stone. Queensmith lists it at £7,768. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1553672759
Dimensions7.87 × 5.92 × 4.06 mm
L/W Ratio1.33
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Indented Natural, Knot, Needle, Extra Facet
Top View
7.87 mm5.92 mm1.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1553672759
Side View
Table 65.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 68.6%

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: £7,768 GBP|Low: £3,850 GBP|High: £7,829 GBP|Avg: £5,392 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
November 1, 2026
Retailer 10£3,879 GBP
Retailer 9£4,138 GBP
Retailer 12£4,326 GBP
Retailer 5£4,571 GBP
Retailer 13£4,774 GBP
Retailer 2£4,840 GBP
Retailer 7£4,961 GBP
Retailer 3£5,068 GBP
Retailer 4£5,293 GBP
Retailer 11£5,652 GBP
Retailer 8£6,356 GBP
Retailer 6£7,621 GBP
Queensmith£7,768 GBP

23 data points across 13 retailers

19 retailers£3,879 GBP to £7,768 GBP

A
Cheapest Retailer
-
£3,879 GBP
HK$40,600 HKD
A
Retailer 2
-
£4,138 GBP
₹528,005 INR
View
A
Retailer 3
-
£4,326 GBP
$5,796 USD
View
Retailer 4
-
£4,455 GBP
SGD 8,067 SGD
View
Price last confirmed 18 days ago
A
Retailer 5
-
£4,571 GBP
SGD 8,277 SGD
View
B+
Retailer 6
-
£4,753 GBP
$6,368 USD
View
B+
Retailer 7
-
£4,754 GBP
$6,370 USD
View
B+
Retailer 8
-
£4,774 GBP
$6,397 USD
View
Final sale: no returns
Retailer 9
-
£4,806 GBP
$6,439 USD
View
Price last confirmed 16 days ago
B+
Retailer 10
-
£4,840 GBP
View
B+
Retailer 11
-
£4,961 GBP
View
B+
Retailer 12
-
£5,068 GBP
$6,790 USD
View
Retailer 13
-
£5,105 GBP
A$10,524 AUD
View
Price last confirmed 28 days ago
B+
Retailer 14
-
£5,293 GBP
$7,091 USD
View
B+
Retailer 15
-
£5,437 GBP
A$11,208 AUD
View
B+
Retailer 16
-
£5,652 GBP
€7,213 EUR
View
B+
Retailer 17
-
£6,356 GBP
ZAR 137,573 ZAR
View
B
Retailer 18
-
£7,621 GBP
View
Most Expensive
B
Queensmith
1553672759 · Oct 28
£7,768 GBP
View
18 more retailers have this diamond
Prices start from £3,879 GBPSave up to £3,889 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
£3,879 GBP