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Marquise|Natural|GIA

1.20ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 2556683633

Certificate GIA 2556683633

Diamond specifications and retailer prices

From £4,368 GBP
As of November 5, 2026
Save £149 GBP (3%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £8,428 GBP at NZ Jewellers · As of September 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 D 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 2556683633. Listed at 14 retailers as of November 4, 2026, with a relatively tight 3% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556683633
Dimensions10.86 × 5.72 × 3.41 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle, Indented Natural, Natural
Top View
10.86 mm5.72 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556683633
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 59.7%

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 5
Current: £4,368 GBP|Low: £3,682 GBP|High: £7,514 GBP|Avg: £4,959 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
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 5, 2026
Retailer 16£3,682 GBP
Retailer 13£3,960 GBP
Retailer 15£4,083 GBP
Retailer 6£4,233 GBP
Retailer 4£4,300 GBP
Retailer 1£4,368 GBP
Retailer 5£4,518 GBP
Retailer 11£4,567 GBP
Retailer 9£4,602 GBP
Retailer 7£4,652 GBP
Retailer 10£4,785 GBP
Retailer 2£4,852 GBP
Retailer 17£5,067 GBP
Retailer 12£5,385 GBP
Retailer 8£6,062 GBP
Retailer 14£6,561 GBP
Retailer 3£7,378 GBP

21 data points across 17 retailers

14 retailers£4,368 GBP to £4,518 GBP

Retailer 1
-
£3,682 GBP
Price last confirmed 27 days ago
Retailer 2
-
£4,083 GBP
View
Price last confirmed 30 days ago
Retailer 3
-
£4,233 GBP
View
Price last confirmed 29 days ago
B+
Retailer 4
-
£4,368 GBP
View
B
Retailer 5
-
£4,518 GBP
View
Retailer 6
-
£4,568 GBP
View
Price last confirmed 30 days ago
Retailer 7
-
£4,852 GBP
View
Price last confirmed 34 days ago
Retailer 8
-
£5,039 GBP
View
Price last confirmed 40 days ago
Retailer 9
-
£5,067 GBP
View
Price last confirmed 29 days ago
Retailer 10
-
£5,815 GBP
View
Price last confirmed 39 days ago
Retailer 11
-
£6,062 GBP
View
Price last confirmed 43 days ago
Retailer 12
-
£6,561 GBP
View
Price last confirmed 27 days ago
Retailer 13
-
£7,378 GBP
View
Price last confirmed 33 days ago
Most Expensive
NZ Jewellers
bf39d3d5-c702-4716-9393-974cdb4c8b3d · Sep 30
£8,428 GBP
$11,281 USD
View
Price last confirmed 37 days ago
13 more retailers have this diamond
Prices start from £4,368 GBPSave up to £149 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
£4,368 GBP