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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

VG • G/SI1 • GIA 1558829621

Certificate GIA 1558829621

Diamond specifications and retailer prices

From £6,785 GBP
As of November 6, 2026
Save £4,929 GBP (42%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £11,713 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G 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 1558829621. Listed at 13 retailers as of November 4, 2026, with prices from £6,785 to £11,713, a £4,929 spread on the same certified stone. MOH London lists it at £11,713. 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
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558829621
Dimensions11.17 × 5.88 × 3.79 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Pinpoint
Top View
11.17 mm5.88 mm1.51 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558829621
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 64.4%

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: £11,713 GBP|Low: £6,071 GBP|High: £11,870 GBP|Avg: £8,143 GBP|-1.2%
MOH London
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 6, 2026
Retailer 8£6,071 GBP
Retailer 5£6,785 GBP
Retailer 6£6,823 GBP
Retailer 11£7,253 GBP
Retailer 7£7,277 GBP
Retailer 4£7,338 GBP
Retailer 12£7,861 GBP
Retailer 10£8,122 GBP
Retailer 2£8,466 GBP
Retailer 15£8,768 GBP
Retailer 14£8,891 GBP
Retailer 16£8,891 GBP
Retailer 9£9,089 GBP
Retailer 3£9,189 GBP
Retailer 13£9,245 GBP
MOH London£11,713 GBP

9 data points across 16 retailers

13 retailers£6,785 GBP to £11,713 GBP

B+
Cheapest Retailer
-
£6,785 GBP
B+
Retailer 2
-
£7,253 GBP
View
B+
Retailer 3
-
£7,338 GBP
View
B
Retailer 4
-
£7,861 GBP
View
B+
Retailer 5
-
£8,122 GBP
View
B
Retailer 6
-
£8,466 GBP
View
B
Retailer 7
-
£8,768 GBP
View
B
Retailer 8
-
£8,891 GBP
View
B
Retailer 9
-
£8,891 GBP
View
B
Retailer 10
-
£9,089 GBP
View
B
Retailer 11
-
£9,189 GBP
View
B
Retailer 12
-
£9,245 GBP
View
Most Expensive
B
MOH London
941042344 · Nov 4
£11,713 GBP
View
12 more retailers have this diamond
Prices start from £6,785 GBPSave up to £4,929 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
£6,785 GBP