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Cushion|Natural|GIA

1.50ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 6542936162

Certificate GIA 6542936162

Diamond specifications and retailer prices

From £4,605 GBP
HK$48,200 HKD
As of November 1, 2026
Save £3,902 GBP (46%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £8,507 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 6542936162. Listed at 18 retailers as of October 28, 2026, with prices from £4,605 to £8,507, a £3,902 spread on the same certified stone. Queensmith lists it at £8,507. 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 6542936162
Dimensions8.16 × 5.83 × 3.82 mm
L/W Ratio1.40
Top View
8.16 mm5.83 mm1.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6542936162
Side View
Table 67.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 65.6%

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: Nov 1
Current: £8,507 GBP|Low: £4,566 GBP|High: £8,559 GBP|Avg: £5,992 GBP|+0.7%
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
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 12£4,605 GBP
Retailer 2£4,884 GBP
Retailer 16£4,987 GBP
Retailer 7£5,241 GBP
Retailer 6£5,255 GBP
Retailer 3£5,509 GBP
Retailer 8£5,523 GBP
Retailer 14£5,523 GBP
Retailer 5£5,601 GBP
Retailer 10£5,725 GBP
Retailer 15£5,816 GBP
Retailer 4£6,197 GBP
Retailer 13£6,631 GBP
Retailer 11£7,455 GBP
Retailer 9£8,458 GBP
Queensmith£8,507 GBP

28 data points across 16 retailers

18 retailers£4,605 GBP to £8,507 GBP

A
Cheapest Retailer
-
£4,605 GBP
HK$48,200 HKD
A
Retailer 2
-
£4,884 GBP
₹623,231 INR
View
B+
Retailer 3
-
£4,987 GBP
$6,682 USD
View
B+
Retailer 4
-
£5,241 GBP
$7,022 USD
View
Retailer 5
-
£5,255 GBP
SGD 9,515 SGD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
£5,509 GBP
SGD 9,975 SGD
View
B+
Retailer 7
-
£5,523 GBP
$7,400 USD
View
B+
Retailer 8
-
£5,523 GBP
$7,400 USD
View
B+
Retailer 9
-
£5,601 GBP
$7,505 USD
View
Final sale: no returns
B+
Retailer 10
-
£5,677 GBP
$7,607 USD
View
B+
Retailer 11
-
£5,725 GBP
View
Retailer 12
-
£5,816 GBP
A$11,989 AUD
View
Price last confirmed 10 days ago
B+
Retailer 13
-
£6,197 GBP
$8,303 USD
View
B+
Retailer 14
-
£6,412 GBP
A$13,218 AUD
View
B+
Retailer 15
-
£6,631 GBP
€8,462 EUR
View
B
Retailer 16
-
£7,455 GBP
ZAR 161,378 ZAR
View
B
Retailer 17
-
£8,458 GBP
View
Most Expensive
B
Queensmith
6542936162 · Oct 28
£8,507 GBP
View
17 more retailers have this diamond
Prices start from £4,605 GBPSave up to £3,902 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
£4,605 GBP