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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 2554673570

Certificate GIA 2554673570

Diamond specifications and retailer prices

From £4,663 GBP
$6,257 USD
As of November 1, 2026
Save £4,532 GBP (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £9,194 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2554673570. Listed at 15 retailers as of October 30, 2026, with prices from £4,663 to £9,194, a £4,532 spread on the same certified stone. NZ Jewellers lists it at £9,194. 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
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2554673570
Dimensions6.02 × 11.23 × 3.76 mm
L/W Ratio1.87
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Cloud, Feather, Needle
Top View
6.02 mm11.23 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2554673570
Side View
Table 54.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 62.5%

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: £9,194 GBP|Low: £4,663 GBP|High: £9,433 GBP|Avg: £5,692 GBP|-2.5%
NZ Jewellers
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 2, 2026
Retailer 14£4,663 GBP
Retailer 15£4,829 GBP
Retailer 6£4,836 GBP
Retailer 7£4,940 GBP
Retailer 10£5,030 GBP
Retailer 4£5,074 GBP
Retailer 3£5,082 GBP
Retailer 11£5,096 GBP
Retailer 9£5,171 GBP
Retailer 5£5,382 GBP
Retailer 13£5,450 GBP
Retailer 2£5,533 GBP
Retailer 8£6,288 GBP
Retailer 12£7,595 GBP
NZ Jewellers£9,194 GBP

31 data points across 15 retailers

15 retailers£4,663 GBP to £9,194 GBP

A
Cheapest Retailer
-
£4,663 GBP
$6,257 USD
B+
Retailer 2
-
£4,829 GBP
$6,480 USD
View
B+
Retailer 3
-
£4,836 GBP
$6,489 USD
View
Retailer 4
-
£4,940 GBP
SGD 8,959 SGD
View
Price last confirmed 21 days ago
B+
Retailer 5
-
£5,030 GBP
$6,750 USD
View
Final sale: no returns
B+
Retailer 6
-
£5,074 GBP
$6,809 USD
View
B+
Retailer 7
-
£5,082 GBP
$6,820 USD
View
B+
Retailer 8
-
£5,096 GBP
View
B+
Retailer 9
-
£5,171 GBP
View
Retailer 10
-
£5,382 GBP
A$11,111 AUD
View
Price last confirmed 11 days ago
B+
Retailer 11
-
£5,450 GBP
$7,313 USD
View
B+
Retailer 12
-
£5,533 GBP
$7,425 USD
View
B
Retailer 13
-
£6,288 GBP
$8,438 USD
View
B
Retailer 14
-
£7,595 GBP
View
Most Expensive
B
NZ Jewellers
c49883fe-d6f6-4c4c-9c3e-40419c4a033f · Oct 30
£9,194 GBP
$12,338 USD
View
14 more retailers have this diamond
Prices start from £4,663 GBPSave up to £4,532 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 Marquise
£4,663 GBP