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Marquise|Natural|GIA

1.20ct L SI2 Marquise Natural Diamond

VG • L/SI2 • GIA 2557118478

Certificate GIA 2557118478

Diamond specifications and retailer prices

From £1,045 GBP
As of November 6, 2026
Save £2,380 GBP (69%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,425 GBP at NZ Jewellers · As of November 5, 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 L colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2557118478. Listed at 11 retailers as of November 5, 2026, with prices from £1,045 to £3,425, a £2,380 spread on the same certified stone. NZ Jewellers lists it at £3,425. 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
L
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2557118478
Dimensions10.17 × 5.50 × 3.55 mm
L/W Ratio1.85
Top View
10.17 mm5.50 mm1.20 ctL / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557118478
Side View
Table 62.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.6%

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 6
Current: £1,045 GBP|Low: £1,045 GBP|High: £1,918 GBP|Avg: £1,450 GBP|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 1£1,045 GBP
Retailer 4£1,279 GBP
Retailer 5£1,469 GBP
Retailer 2£1,516 GBP
Retailer 3£1,910 GBP

44 data points across 5 retailers

11 retailers£1,045 GBP to £3,425 GBP

A
Cheapest Retailer
-
£1,045 GBP
B+
Retailer 2
-
£1,279 GBP
View
Retailer 3
-
£1,404 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£1,404 GBP
View
B+
Retailer 5
-
£1,420 GBP
View
B+
Retailer 6
-
£1,469 GBP
View
B+
Retailer 7
-
£1,516 GBP
View
B
Retailer 8
-
£1,620 GBP
View
B
Retailer 9
-
£1,620 GBP
View
B
Retailer 10
-
£1,910 GBP
View
Most Expensive
C
NZ Jewellers
dbec343c-24be-4e25-9c54-56c14cb71550 · Nov 5
£3,425 GBP
$4,610 USD
View
10 more retailers have this diamond
Prices start from £1,045 GBPSave up to £2,380 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
£1,045 GBP