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Marquise|Natural|GIA

1.20ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 2556611130

Certificate GIA 2556611130

Diamond specifications and retailer prices

From £2,744 GBP
$3,676 USD
As of October 30, 2026
Save £3,252 GBP (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £5,995 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556611130. Listed at 21 retailers as of October 30, 2026, with prices from £2,744 to £5,995, a £3,252 spread on the same certified stone. NZ Jewellers lists it at £5,995. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556611130
Dimensions10.54 × 5.57 × 3.52 mm
L/W Ratio1.89
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Indented Natural
Top View
10.54 mm5.57 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556611130
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.3%

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: Oct 30
Current: £5,995 GBP|Low: £2,114 GBP|High: £5,995 GBP|Avg: £3,147 GBP|+17.1%
NZ Jewellers
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Retailer 28
October 30, 2026
Retailer 20£2,114 GBP
Retailer 16£2,229 GBP
Retailer 22£2,744 GBP
Retailer 2£2,786 GBP
Retailer 28£2,928 GBP
Retailer 5£2,963 GBP
Retailer 15£3,101 GBP
Retailer 23£3,105 GBP
Retailer 4£3,117 GBP
Retailer 6£3,117 GBP
Retailer 10£3,117 GBP
Retailer 21£3,127 GBP
Retailer 24£3,151 GBP
Retailer 14£3,162 GBP
Retailer 7£3,270 GBP
Retailer 8£3,308 GBP
Retailer 26£3,367 GBP
Retailer 19£3,377 GBP
Retailer 27£3,422 GBP
Retailer 11£3,515 GBP
Retailer 13£3,515 GBP
Retailer 17£3,521 GBP
Retailer 3£3,595 GBP
Retailer 25£3,627 GBP
Retailer 12£3,634 GBP
Retailer 9£3,891 GBP
Retailer 18£4,947 GBP
NZ Jewellers£5,995 GBP

14 data points across 28 retailers

21 retailers£2,744 GBP to £5,995 GBP

B+
Cheapest Retailer
-
£2,744 GBP
$3,676 USD
B
Retailer 2
-
£2,786 GBP
$3,733 USD
View
B
Retailer 3
-
£2,928 GBP
$3,923 USD
View
B
Retailer 4
-
£2,963 GBP
$3,970 USD
View
Retailer 5
-
£3,101 GBP
A$6,392 AUD
View
Price last confirmed 35 days ago
B
Retailer 6
-
£3,105 GBP
$4,160 USD
View
B
Retailer 7
-
£3,117 GBP
$4,177 USD
View
B
Retailer 8
-
£3,117 GBP
$4,177 USD
View
B
Retailer 9
-
£3,151 GBP
CA$5,863 CAD
View
B
Retailer 10
-
£3,270 GBP
$4,382 USD
View
B
Retailer 11
-
£3,308 GBP
$4,433 USD
View
B
Retailer 12
-
£3,367 GBP
View
Retailer 13
-
£3,377 GBP
$4,525 USD
View
Price last confirmed 39 days ago
B
Retailer 14
-
£3,422 GBP
View
B
Retailer 15
-
£3,503 GBP
$4,693 USD
View
B
Retailer 16
-
£3,515 GBP
$4,710 USD
View
B
Retailer 17
-
£3,515 GBP
$4,710 USD
View
B
Retailer 18
-
£3,595 GBP
$4,817 USD
View
B
Retailer 19
-
£3,627 GBP
$4,860 USD
View
B
Retailer 20
-
£3,634 GBP
$4,869 USD
View
Most Expensive
B
NZ Jewellers
37847300-0b2d-4569-b8cc-9f53c7a5744a · Oct 30
£5,995 GBP
$8,033 USD
View
20 more retailers have this diamond
Prices start from £2,744 GBPSave up to £3,252 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
£2,744 GBP