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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

GD • G/SI1 • GIA 6561587509

Certificate GIA 6561587509

Diamond specifications and retailer prices

From £5,775 GBP
As of November 4, 2026
Save £4,577 GBP (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £10,352 GBP at With Clarity · As of November 6, 2026
View at With Clarity

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6561587509. Listed at 13 retailers as of November 4, 2026, with prices from £5,775 to £10,352, a £4,577 spread on the same certified stone. With Clarity lists it at £10,352. 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
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.81°
Pavilion angle40.54°
OriginNatural
Grading LabGIA
CertificateGIA 6561587509
Dimensions10.64 × 5.84 × 3.94 mm
L/W Ratio1.82
Culet sizeNone
Top View
10.64 mm5.84 mm1.51 ctG / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6561587509
Side View
Table 61.0%Crown 43.81°Girdle: VTN-VTKPavilion 40.54°Culet: NoneDepth 67.5%

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 4
Current: £6,495 GBP|Low: £5,775 GBP|High: £10,352 GBP|Avg: £7,037 GBP|-18.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
With Clarity
November 6, 2026
Retailer 4£5,775 GBP
Retailer 11£6,114 GBP
Retailer 10£6,356 GBP
Retailer 2£6,444 GBP
Retailer 1£6,495 GBP
Retailer 6£6,516 GBP
Retailer 12£6,522 GBP
Retailer 3£7,418 GBP
Retailer 7£7,488 GBP
Retailer 5£7,618 GBP
Retailer 8£7,627 GBP
Retailer 9£9,377 GBP
With Clarity£10,352 GBP

8 data points across 13 retailers

13 retailers£5,775 GBP to £10,352 GBP

B+
Cheapest Retailer
-
£5,775 GBP
B+
Retailer 2
-
£6,114 GBP
View
B+
Retailer 3
-
£6,356 GBP
View
B+
Retailer 4
-
£6,444 GBP
View
B+
Retailer 5
-
£6,495 GBP
View
B+
Retailer 6
-
£6,516 GBP
View
B+
Retailer 7
-
£6,522 GBP
View
B
Retailer 8
-
£7,418 GBP
View
B
Retailer 9
-
£7,488 GBP
View
B
Retailer 10
-
£7,618 GBP
View
B
Retailer 11
-
£7,627 GBP
View
B
Retailer 12
-
£9,377 GBP
View
Most Expensive
B
With Clarity
6561587509 · Nov 6
£10,352 GBP
$13,856 USD
View
12 more retailers have this diamond
Prices start from £5,775 GBPSave up to £4,577 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
£5,775 GBP