Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 6555349689

Certificate GIA 6555349689

Diamond specifications and retailer prices

From £3,145 GBP
As of November 6, 2026
Save £3,571 GBP (53%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: £7,052 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-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 6555349689. Listed at 28 retailers as of November 1, 2026, with a 114% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle40.45°
Pavilion angle40.67°
OriginNatural
Grading LabGIA
CertificateGIA 6555349689
Dimensions10.16 × 5.45 × 3.58 mm
L/W Ratio1.86
Culet sizeNone
Top View
10.16 mm5.45 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6555349689
Side View
Table 60.0%Crown 40.45°Girdle: VTN-VTKPavilion 40.67°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: £7,052 GBP|Low: £2,541 GBP|High: £7,052 GBP|Avg: £3,984 GBP
NZ Jewellers
Retailer 2
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Retailer 29
November 3, 2026
Retailer 21£2,781 GBP
Retailer 20£2,931 GBP
Retailer 4£3,220 GBP
Retailer 9£3,294 GBP
Retailer 3£3,331 GBP
Retailer 16£3,331 GBP
Retailer 12£3,372 GBP
Retailer 11£3,525 GBP
Retailer 15£3,590 GBP
Retailer 10£3,782 GBP
Retailer 13£3,820 GBP
Retailer 26£3,820 GBP
Retailer 29£3,820 GBP
Retailer 19£3,951 GBP
Retailer 7£3,963 GBP
Retailer 22£3,974 GBP
Retailer 23£4,112 GBP
Retailer 2£4,113 GBP
Retailer 8£4,229 GBP
Retailer 18£4,229 GBP
Retailer 5£4,238 GBP
Retailer 14£4,327 GBP
Retailer 17£4,371 GBP
Retailer 28£4,407 GBP
Retailer 24£4,501 GBP
Retailer 27£5,183 GBP
Retailer 6£6,106 GBP
Retailer 25£6,716 GBP
NZ Jewellers£7,052 GBP

28 data points across 29 retailers

28 retailers£3,145 GBP to £6,716 GBP

Retailer 1
-
£3,115 GBP
Price last confirmed 30 days ago
B
Retailer 2
-
£3,145 GBP
View
B+
Retailer 3
-
£3,220 GBP
View
B
Retailer 4
-
£3,294 GBP
View
B
Retailer 5
-
£3,331 GBP
View
B
Retailer 6
-
£3,331 GBP
View
B
Retailer 7
-
£3,372 GBP
View
B
Retailer 8
-
£3,474 GBP
View
B
Retailer 9
-
£3,590 GBP
View
B
Retailer 10
-
£3,782 GBP
View
B
Retailer 11
-
£3,820 GBP
View
Retailer 12
-
£3,820 GBP
View
Price last confirmed 8 days ago
B
Retailer 13
-
£3,820 GBP
View
Retailer 14
-
£3,951 GBP
View
Price last confirmed 22 days ago
B
Retailer 15
-
£3,963 GBP
View
B
Retailer 16
-
£4,112 GBP
View
B
Retailer 17
-
£4,113 GBP
View
B
Retailer 18
-
£4,229 GBP
View
B
Retailer 19
-
£4,229 GBP
View
Retailer 20
-
£4,238 GBP
View
Price last confirmed 19 days ago
B
Retailer 21
-
£4,327 GBP
View
B
Retailer 22
-
£4,371 GBP
View
B
Retailer 23
-
£4,407 GBP
View
B
Retailer 24
-
£4,501 GBP
View
B
Retailer 25
-
£5,183 GBP
View
Retailer 26
-
£6,106 GBP
View
Price last confirmed 10 days ago
B
Retailer 27
-
£6,716 GBP
View
Most Expensive
NZ Jewellers
89af7956-ae5e-4b27-b12a-bb96dfb8765d · Oct 30
£7,052 GBP
$9,439 USD
View
Price last confirmed 7 days ago
27 more retailers have this diamond
Prices start from £3,145 GBPSave up to £3,571 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+
1.20ct Marquise
£3,145 GBP