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Marquise|Natural|GIA

1.51ct H SI2 Marquise Natural Diamond

VG • H/SI2 • GIA 5556328242

Certificate GIA 5556328242

Diamond specifications and retailer prices

From £4,671 GBP
SGD 8,457 SGD
As of November 1, 2026
Save £1,949 GBP (29%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £6,619 GBP at Diamonds Direct · As of November 1, 2026
View at Diamonds Direct

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 SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5556328242. Listed at 12 retailers as of November 1, 2026, with prices from £4,671 to £6,619, a £1,949 spread on the same certified stone. Diamonds Direct lists it at £6,619. 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
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.08°
Pavilion angle41.86°
OriginNatural
Grading LabGIA
CertificateGIA 5556328242
Dimensions11.04 × 5.96 × 3.90 mm
L/W Ratio1.85
Culet sizeNone
Top View
11.04 mm5.96 mm1.51 ctH / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556328242
Side View
Table 62.0%Crown 39.08°Girdle: MED-VTKPavilion 41.86°Culet: NoneDepth 65.5%

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: £6,619 GBP|Low: £4,671 GBP|High: £7,103 GBP|Avg: £5,668 GBP|-6.8%
Diamonds Direct
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 8£4,671 GBP
Retailer 5£4,765 GBP
Retailer 9£4,861 GBP
Retailer 6£4,941 GBP
Retailer 7£5,009 GBP
Retailer 4£5,153 GBP
Retailer 11£5,841 GBP
Retailer 10£5,883 GBP
Retailer 3£5,930 GBP
Retailer 2£5,949 GBP
Diamonds Direct£6,619 GBP

36 data points across 11 retailers

12 retailers£4,671 GBP to £6,619 GBP

A
Cheapest Retailer
-
£4,671 GBP
SGD 8,457 SGD
A
Retailer 2
-
£4,765 GBP
$6,385 USD
View
A
Retailer 3
-
£4,861 GBP
SGD 8,801 SGD
View
A
Retailer 4
-
£4,941 GBP
$6,621 USD
View
A
Retailer 5
-
£5,009 GBP
$6,711 USD
View
B+
Retailer 6
-
£5,153 GBP
View
B+
Retailer 7
-
£5,841 GBP
$7,827 USD
View
B+
Retailer 8
-
£5,883 GBP
$7,882 USD
View
B+
Retailer 9
-
£5,930 GBP
$7,945 USD
View
B+
Retailer 10
-
£5,949 GBP
€7,592 EUR
View
B
Retailer 11
-
£6,344 GBP
$8,500 USD
View
Most Expensive
B
Diamonds Direct
1029438 · Nov 1
£6,619 GBP
$8,869 USD
View
11 more retailers have this diamond
Prices start from £4,671 GBPSave up to £1,949 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
£4,671 GBP