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Marquise|Natural|GIA

1.20ct F SI1 Marquise Natural Diamond

ID • F/SI1 • GIA 5553485865

Certificate GIA 5553485865

Diamond specifications and retailer prices

From £3,167 GBP
As of November 2, 2026
Save £2,491 GBP (44%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £5,658 GBP at NZ Jewellers · As of November 3, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5553485865. Listed at 8 retailers as of November 2, 2026, with prices from £3,167 to £5,658, a £2,491 spread on the same certified stone. NZ Jewellers lists it at £5,658. 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
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle41.45°
Pavilion angle40.72°
OriginNatural
Grading LabGIA
CertificateGIA 5553485865
Dimensions9.65 × 5.45 × 3.72 mm
L/W Ratio1.77
Girdle conditionExtremely Thick
Key to symbols
Twinning Wisp, Crystal, Feather, Cavity, Needle, Indented Natural, Natural
Top View
9.65 mm5.45 mm1.20 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5553485865
Side View
Table 57.0%Crown 41.45°Girdle: MED-ETKPavilion 40.72°Culet: NoneDepth 68.2%

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 2
Current: £5,658 GBP|Low: £3,145 GBP|High: £5,922 GBP|Avg: £3,943 GBP|-4.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 3£3,167 GBP
Retailer 2£3,242 GBP
Retailer 5£3,242 GBP
Retailer 6£3,247 GBP
Retailer 7£3,247 GBP
Retailer 8£3,409 GBP
Retailer 4£5,171 GBP
NZ Jewellers£5,658 GBP

36 data points across 8 retailers

8 retailers£3,167 GBP to £5,658 GBP

B+
Cheapest Retailer
-
£3,167 GBP
B+
Retailer 2
-
£3,242 GBP
View
B+
Retailer 3
-
£3,242 GBP
View
B+
Retailer 4
-
£3,247 GBP
View
B+
Retailer 5
-
£3,247 GBP
View
Retailer 6
-
£3,409 GBP
View
Price last confirmed 29 days ago
B
Retailer 7
-
£5,171 GBP
View
Most Expensive
B
NZ Jewellers
34c17652-4e11-4532-b3c9-bd3c2343fe47 · Nov 3
£5,658 GBP
$7,573 USD
View
7 more retailers have this diamond
Prices start from £3,167 GBPSave up to £2,491 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
£3,167 GBP