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Cushion|Natural|GIA

1.51ct F SI1 Cushion Natural Diamond

VG • F/SI1 • GIA 1545346290

Certificate GIA 1545346290

Diamond specifications and retailer prices

From £2,842 GBP
HK$29,800 HKD
As of November 1, 2026
Save £3,759 GBP (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £6,601 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1545346290. Listed at 18 retailers as of October 28, 2026, with prices from £2,842 to £6,601, a £3,759 spread on the same certified stone. Queensmith lists it at £6,601. 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

1.51
Carat
F
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1545346290
Dimensions7.47 × 5.88 × 4.12 mm
L/W Ratio1.27
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.47 mm5.88 mm1.51 ctF / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1545346290
Side View
Table 62.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 70.1%

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: £6,601 GBP|Low: £2,814 GBP|High: £6,648 GBP|Avg: £4,101 GBP|+2.1%
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
November 3, 2026
Retailer 12£2,842 GBP
Retailer 8£3,054 GBP
Retailer 14£3,318 GBP
Retailer 6£3,351 GBP
Retailer 3£3,464 GBP
Retailer 15£3,614 GBP
Retailer 2£3,733 GBP
Retailer 13£3,754 GBP
Retailer 4£3,793 GBP
Retailer 7£3,813 GBP
Retailer 5£3,867 GBP
Retailer 9£4,247 GBP
Retailer 11£4,614 GBP
Retailer 10£5,978 GBP
Queensmith£6,601 GBP

29 data points across 15 retailers

18 retailers£2,842 GBP to £6,601 GBP

A
Cheapest Retailer
-
£2,842 GBP
HK$29,800 HKD
A
Retailer 2
-
£3,054 GBP
₹390,355 INR
View
A
Retailer 3
-
£3,318 GBP
$4,452 USD
View
A
Retailer 4
-
£3,351 GBP
SGD 6,077 SGD
View
A
Retailer 5
-
£3,464 GBP
$4,649 USD
View
Final sale: no returns
A
Retailer 6
-
£3,485 GBP
$4,676 USD
View
A
Retailer 7
-
£3,487 GBP
$4,680 USD
View
A
Retailer 8
-
£3,614 GBP
SGD 6,553 SGD
View
A
Retailer 9
-
£3,733 GBP
View
A
Retailer 10
-
£3,754 GBP
$5,037 USD
View
B+
Retailer 11
-
£3,793 GBP
$5,090 USD
View
Retailer 12
-
£3,813 GBP
A$7,873 AUD
View
Price last confirmed 24 days ago
B+
Retailer 13
-
£3,859 GBP
A$7,968 AUD
View
B+
Retailer 14
-
£3,867 GBP
$5,189 USD
View
B+
Retailer 15
-
£4,247 GBP
€5,428 EUR
View
B+
Retailer 16
-
£4,614 GBP
ZAR 100,023 ZAR
View
B
Retailer 17
-
£5,978 GBP
View
Most Expensive
B
Queensmith
1545346290 · Oct 28
£6,601 GBP
View
17 more retailers have this diamond
Prices start from £2,842 GBPSave up to £3,759 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
£2,842 GBP