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Marquise|Natural|GIA

1.20ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 6555703280

Certificate GIA 6555703280

Diamond specifications and retailer prices

From £2,347 GBP
₹299,507 INR
As of November 2, 2026
Save £3,093 GBP (57%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £5,440 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 6555703280. Listed at 23 retailers as of October 30, 2026, with prices from £2,347 to £5,440, a £3,093 spread on the same certified stone. NZ Jewellers lists it at £5,440. 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 6555703280
Dimensions10.70 × 5.36 × 3.42 mm
L/W Ratio2.00
Top View
10.70 mm5.36 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555703280
Side View
Table 58.0%CrownGirdle: STK-XTKPavilionCulet: NoneDepth 63.9%

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: £5,440 GBP|Low: £2,347 GBP|High: £5,440 GBP|Avg: £3,307 GBP
NZ Jewellers
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
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
November 2, 2026
Retailer 2£2,347 GBP
Retailer 9£2,666 GBP
Retailer 7£2,748 GBP
Retailer 12£2,769 GBP
Retailer 3£2,795 GBP
Retailer 15£2,859 GBP
Retailer 6£2,882 GBP
Retailer 8£2,970 GBP
Retailer 13£3,046 GBP
Retailer 21£3,123 GBP
Retailer 22£3,123 GBP
Retailer 23£3,123 GBP
Retailer 18£3,168 GBP
Retailer 11£3,233 GBP
Retailer 14£3,313 GBP
Retailer 10£3,348 GBP
Retailer 16£3,386 GBP
Retailer 17£3,533 GBP
Retailer 4£3,603 GBP
Retailer 20£3,838 GBP
Retailer 5£4,514 GBP
Retailer 19£5,222 GBP
NZ Jewellers£5,440 GBP

23 data points across 23 retailers

23 retailers£2,347 GBP to £5,440 GBP

B+
Cheapest Retailer
-
£2,347 GBP
₹299,507 INR
B
Retailer 2
-
£2,666 GBP
$3,572 USD
View
B
Retailer 3
-
£2,748 GBP
$3,682 USD
View
B
Retailer 4
-
£2,769 GBP
$3,710 USD
View
B
Retailer 5
-
£2,795 GBP
$3,745 USD
View
B
Retailer 6
-
£2,859 GBP
$3,831 USD
View
B
Retailer 7
-
£2,882 GBP
$3,862 USD
View
Final sale: no returns
B
Retailer 8
-
£2,970 GBP
$3,980 USD
View
B
Retailer 9
-
£3,046 GBP
View
B
Retailer 10
-
£3,123 GBP
$4,184 USD
View
B
Retailer 11
-
£3,123 GBP
$4,184 USD
View
B
Retailer 12
-
£3,123 GBP
$4,184 USD
View
B
Retailer 13
-
£3,168 GBP
View
B
Retailer 14
-
£3,233 GBP
$4,332 USD
View
B
Retailer 15
-
£3,313 GBP
$4,439 USD
View
Retailer 16
-
£3,348 GBP
A$6,901 AUD
View
Price last confirmed 29 days ago
B
Retailer 17
-
£3,386 GBP
$4,537 USD
View
B
Retailer 18
-
£3,533 GBP
€4,509 EUR
View
B
Retailer 19
-
£3,603 GBP
$4,827 USD
View
B
Retailer 20
-
£3,838 GBP
ZAR 83,079 ZAR
View
B
Retailer 21
-
£4,514 GBP
$6,048 USD
View
B
Retailer 22
-
£5,222 GBP
View
Most Expensive
B
NZ Jewellers
ac532a44-bd7d-45e3-ad64-4a41ba6839dc · Oct 30
£5,440 GBP
$7,289 USD
View
22 more retailers have this diamond
Prices start from £2,347 GBPSave up to £3,093 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
£2,347 GBP