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Marquise|Natural|GIA

1.20ct D SI2 Marquise Natural Diamond

ID • D/SI2 • GIA 3555587349

Certificate GIA 3555587349

Diamond specifications and retailer prices

From £3,127 GBP
As of November 1, 2026
Save £3,520 GBP (53%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £7,194 GBP at NZ Jewellers · As of September 20, 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3555587349. Listed at 17 retailers as of November 1, 2026, with a 113% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.20
Carat
D
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555587349
Dimensions10.52 × 5.54 × 3.43 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cavity, Indented Natural, Cloud
Top View
10.52 mm5.54 mm1.20 ctD / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3555587349
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 61.9%

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: £3,795 GBP|Low: £3,098 GBP|High: £6,682 GBP|Avg: £4,321 GBP|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 9£3,127 GBP
Retailer 7£3,275 GBP
Retailer 4£3,667 GBP
Retailer 1£3,795 GBP
Retailer 3£3,851 GBP
Retailer 11£3,978 GBP
Retailer 6£4,071 GBP
Retailer 2£4,161 GBP
Retailer 12£4,288 GBP
Retailer 5£4,721 GBP
Retailer 10£6,015 GBP
Retailer 8£6,646 GBP

35 data points across 12 retailers

17 retailers£3,127 GBP to £6,646 GBP

A
Cheapest Retailer
-
£3,127 GBP
A
Retailer 2
-
£3,275 GBP
View
B+
Retailer 3
-
£3,667 GBP
View
B+
Retailer 4
-
£3,795 GBP
View
B+
Retailer 5
-
£3,924 GBP
View
Retailer 6
-
£3,978 GBP
View
Price last confirmed 10 days ago
B+
Retailer 7
-
£4,071 GBP
View
B+
Retailer 8
-
£4,112 GBP
View
B+
Retailer 9
-
£4,161 GBP
View
B+
Retailer 10
-
£4,288 GBP
View
Retailer 11
-
£4,301 GBP
View
Price last confirmed 45 days ago
Retailer 12
-
£4,301 GBP
View
Price last confirmed 25 days ago
B+
Retailer 13
-
£4,721 GBP
View
Retailer 14
-
£4,963 GBP
View
Price last confirmed 45 days ago
Retailer 15
-
£6,015 GBP
View
Price last confirmed 9 days ago
B
Retailer 16
-
£6,646 GBP
View
Most Expensive
NZ Jewellers
511f7a61-bfc8-4c98-b7d1-edb8b243d320 · Sep 20
£7,194 GBP
$9,629 USD
View
Price last confirmed 46 days ago
16 more retailers have this diamond
Prices start from £3,127 GBPSave up to £3,520 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
1.20ct Marquise
£3,127 GBP