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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 1558321176

Certificate GIA 1558321176

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)
19 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 1558321176. Listed at 19 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
SymmetryExcellent
FluorescenceNone
Crown angle40.1°
Pavilion angle40.97°
OriginNatural
Grading LabGIA
CertificateGIA 1558321176
Dimensions11.00 × 5.94 × 3.90 mm
L/W Ratio1.85
Culet sizeNone
Top View
11.00 mm5.94 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558321176
Side View
Table 58.0%Crown 40.1°Girdle: MED-THKPavilion 40.97°Culet: NoneDepth 65.7%

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: £7,092 GBP|Low: £5,611 GBP|High: £10,589 GBP|Avg: £6,941 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
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Retailer 15
Retailer 16
Retailer 17
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Retailer 19
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Retailer 21
Retailer 22
November 6, 2026
Retailer 15£5,611 GBP
Retailer 6£5,649 GBP
Retailer 14£5,833 GBP
Retailer 8£5,871 GBP
Retailer 13£5,925 GBP
Retailer 5£5,951 GBP
Retailer 20£6,643 GBP
Retailer 19£6,654 GBP
Retailer 10£6,939 GBP
Retailer 1£7,092 GBP
Retailer 22£7,092 GBP
Retailer 18£7,437 GBP
Retailer 7£7,865 GBP
Retailer 16£7,910 GBP
Retailer 2£8,084 GBP
Retailer 3£8,084 GBP
Retailer 17£8,200 GBP
Retailer 12£8,341 GBP
Retailer 4£8,353 GBP
Retailer 11£8,658 GBP
Retailer 9£9,562 GBP
Retailer 21£10,589 GBP

29 data points across 22 retailers

19 retailers£6,643 GBP to £11,331 GBP

Retailer 1
-
£5,611 GBP
Price last confirmed 26 days ago
Retailer 2
-
£5,871 GBP
View
Price last confirmed 17 days ago
Retailer 3
-
£5,925 GBP
View
Price last confirmed 19 days ago
Retailer 4
-
£5,951 GBP
View
Price last confirmed 15 days ago
B+
Retailer 5
-
£6,643 GBP
View
B
Retailer 6
-
£6,654 GBP
View
Retailer 7
-
£6,939 GBP
View
Price last confirmed 18 days ago
B
Retailer 8
-
£7,092 GBP
View
Retailer 9
-
£7,092 GBP
View
B
Retailer 10
-
£7,437 GBP
View
B
Retailer 11
-
£7,910 GBP
View
B
Retailer 12
-
£8,084 GBP
View
B
Retailer 13
-
£8,084 GBP
View
B
Retailer 14
-
£8,200 GBP
View
B
Retailer 15
-
£8,341 GBP
View
B
Retailer 16
-
£8,353 GBP
View
Retailer 17
-
£8,658 GBP
View
Price last confirmed 18 days ago
B
Retailer 18
-
£10,589 GBP
View
Most Expensive
B
NZ Jewellers
a2d2d991-c6f1-4507-ab22-f9d53492dd11 · Nov 5
£11,331 GBP
$15,166 USD
View
18 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