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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6542714039

Certificate GIA 6542714039

Diamond specifications and retailer prices

From £2,532 GBP
HK$26,500 HKD
As of November 2, 2026
Save £2,873 GBP (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,450 GBP at Wholesale Diamonds Direct · As of October 23, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural cushion diamond

This 1.51ct 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542714039. Listed at 19 retailers as of November 1, 2026, with a 113% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle30.8°
OriginNatural
Grading LabGIA
CertificateGIA 6542714039
Dimensions7.36 × 5.88 × 4.04 mm
L/W Ratio1.25
Top View
7.36 mm5.88 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542714039
Side View
Table 64.0%CrownGirdle: STK-THKPavilion 30.8°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 2
Current: £2,532 GBP|Low: £2,493 GBP|High: £5,741 GBP|Avg: £3,512 GBP|-3.6%
Retailer 1
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
Wholesale Diamonds Direct
November 2, 2026
Retailer 1£2,532 GBP
Retailer 15£2,890 GBP
Retailer 3£2,890 GBP
Retailer 6£2,933 GBP
Retailer 14£3,041 GBP
Retailer 12£3,176 GBP
Retailer 8£3,179 GBP
Retailer 13£3,231 GBP
Retailer 9£3,266 GBP
Retailer 2£3,317 GBP
Retailer 11£3,366 GBP
Retailer 5£3,370 GBP
Retailer 7£3,407 GBP
Retailer 10£3,894 GBP
Retailer 4£4,320 GBP
Retailer 16£5,405 GBP
Wholesale Diamonds Direct£5,450 GBP

20 data points across 17 retailers

19 retailers£2,532 GBP to £5,405 GBP

A
Cheapest Retailer
-
£2,532 GBP
HK$26,500 HKD
A
Retailer 2
-
£2,890 GBP
$3,872 USD
View
A
Retailer 3
-
£2,890 GBP
€3,688 EUR
View
A
Retailer 4
-
£2,933 GBP
$3,930 USD
View
A
Retailer 5
-
£3,041 GBP
$4,074 USD
View
A
Retailer 6
-
£3,112 GBP
A$6,414 AUD
View
B+
Retailer 7
-
£3,176 GBP
$4,256 USD
View
Final sale: no returns
A
Retailer 8
-
£3,179 GBP
$4,260 USD
View
A
Retailer 9
-
£3,231 GBP
View
A
Retailer 10
-
£3,266 GBP
View
B+
Retailer 11
-
£3,317 GBP
$4,445 USD
View
B+
Retailer 12
-
£3,366 GBP
$4,510 USD
View
A
Retailer 13
-
£3,370 GBP
$4,515 USD
View
Retailer 14
-
£3,407 GBP
$4,565 USD
View
Price last confirmed 13 days ago
Retailer 15
-
£3,688 GBP
A$7,602 AUD
View
Price last confirmed 23 days ago
B+
Retailer 16
-
£3,894 GBP
€4,969 EUR
View
B+
Retailer 17
-
£4,320 GBP
ZAR 93,504 ZAR
View
B
Retailer 18
-
£5,405 GBP
View
Most Expensive
Wholesale Diamonds Direct
425955155 · Oct 23
£5,450 GBP
$7,302 USD
View
Price last confirmed 9 days ago
18 more retailers have this diamond
Prices start from £2,532 GBPSave up to £2,873 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
1.51ct Cushion
£2,532 GBP