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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 2557673649

Certificate GIA 2557673649

Diamond specifications and retailer prices

From £6,643 GBP
As of November 6, 2026
Save £4,688 GBP (41%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £11,331 GBP at NZ Jewellers · As of November 5, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2557673649. Listed at 16 retailers as of November 5, 2026, with prices from £6,643 to £11,331, a £4,688 spread on the same certified stone. NZ Jewellers lists it at £11,331. 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.6°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 2557673649
Dimensions11.04 × 5.91 × 3.82 mm
L/W Ratio1.87
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle, Natural
Top View
11.04 mm5.91 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557673649
Side View
Table 63.0%Crown 34.6°Girdle: STK-VTKPavilion 40.4°Culet: NoneDepth 64.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £11,331 GBP|Low: £6,612 GBP|High: £11,331 GBP|Avg: £7,303 GBP
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
Retailer 16
Retailer 17
November 6, 2026
Retailer 9£6,612 GBP
Retailer 16£6,643 GBP
Retailer 14£6,654 GBP
Retailer 8£6,814 GBP
Retailer 2£7,092 GBP
Retailer 3£7,092 GBP
Retailer 13£7,437 GBP
Retailer 11£7,638 GBP
Retailer 15£7,640 GBP
Retailer 7£7,910 GBP
Retailer 4£8,084 GBP
Retailer 5£8,084 GBP
Retailer 12£8,200 GBP
Retailer 10£8,341 GBP
Retailer 6£8,353 GBP
Retailer 17£10,589 GBP
NZ Jewellers£11,331 GBP

25 data points across 17 retailers

16 retailers£6,643 GBP to £11,331 GBP

B+
Cheapest Retailer
-
£6,643 GBP
B+
Retailer 2
-
£6,654 GBP
View
Retailer 3
-
£6,814 GBP
View
Price last confirmed 16 days ago
B+
Retailer 4
-
£7,092 GBP
View
Retailer 5
-
£7,092 GBP
View
B
Retailer 6
-
£7,437 GBP
View
B
Retailer 7
-
£7,638 GBP
View
B
Retailer 8
-
£7,640 GBP
View
B
Retailer 9
-
£7,910 GBP
View
B
Retailer 10
-
£8,084 GBP
View
B
Retailer 11
-
£8,084 GBP
View
B
Retailer 12
-
£8,200 GBP
View
B
Retailer 13
-
£8,341 GBP
View
B
Retailer 14
-
£8,353 GBP
View
B
Retailer 15
-
£10,589 GBP
View
Most Expensive
C
NZ Jewellers
bdc42ab6-79b9-4906-bbc7-3852fac9c939 · Nov 5
£11,331 GBP
$15,166 USD
View
15 more retailers have this diamond
Prices start from £6,643 GBPSave up to £4,688 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.

B+
1.51ct Marquise
£6,643 GBP