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Marquise|Natural|GIA

1.20ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 6552516815

Certificate GIA 6552516815

Diamond specifications and retailer prices

From £1,605 GBP
$2,150 USD
As of November 1, 2026
Save £2,584 GBP (62%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £4,188 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 6552516815. Listed at 23 retailers as of October 30, 2026, with prices from £1,605 to £4,188, a £2,584 spread on the same certified stone. NZ Jewellers lists it at £4,188. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6552516815
Dimensions10.47 × 5.51 × 3.50 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Indented Natural, Needle, Extra Facet
Top View
10.47 mm5.51 mm1.20 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6552516815
Side View
Table 61.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 63.6%

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 1
Current: £4,188 GBP|Low: £1,592 GBP|High: £4,271 GBP|Avg: £2,150 GBP|-1.9%
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
November 2, 2026
Retailer 14£1,592 GBP
Retailer 16£1,605 GBP
Retailer 9£1,676 GBP
Retailer 3£1,686 GBP
Retailer 19£1,807 GBP
Retailer 6£1,815 GBP
Retailer 8£1,815 GBP
Retailer 12£1,819 GBP
Retailer 21£1,821 GBP
Retailer 10£1,846 GBP
Retailer 5£1,849 GBP
Retailer 7£1,899 GBP
Retailer 2£1,954 GBP
Retailer 20£2,029 GBP
Retailer 11£2,094 GBP
Retailer 15£2,124 GBP
Retailer 18£2,463 GBP
Retailer 13£2,501 GBP
Retailer 4£3,105 GBP
Retailer 17£3,510 GBP
NZ Jewellers£4,188 GBP

20 data points across 21 retailers

23 retailers£1,605 GBP to £4,188 GBP

Retailer 1
-
£1,592 GBP
₹203,216 INR
Price last confirmed 11 days ago
A
Retailer 2
-
£1,605 GBP
$2,150 USD
View
B+
Retailer 3
-
£1,676 GBP
$2,245 USD
View
Final sale: no returns
A
Retailer 4
-
£1,686 GBP
$2,259 USD
View
A
Retailer 5
-
£1,807 GBP
$2,422 USD
View
A
Retailer 6
-
£1,815 GBP
$2,432 USD
View
A
Retailer 7
-
£1,815 GBP
$2,432 USD
View
B+
Retailer 8
-
£1,819 GBP
$2,437 USD
View
B+
Retailer 9
-
£1,821 GBP
$2,440 USD
View
B+
Retailer 10
-
£1,846 GBP
$2,474 USD
View
B+
Retailer 11
-
£1,849 GBP
$2,478 USD
View
B+
Retailer 12
-
£1,899 GBP
$2,544 USD
View
B+
Retailer 13
-
£1,954 GBP
View
B+
Retailer 14
-
£2,029 GBP
$2,719 USD
View
B+
Retailer 15
-
£2,094 GBP
$2,806 USD
View
B+
Retailer 16
-
£2,124 GBP
View
B+
Retailer 17
-
£2,134 GBP
A$4,398 AUD
View
Retailer 18
-
£2,289 GBP
A$4,718 AUD
View
Price last confirmed 25 days ago
B
Retailer 19
-
£2,463 GBP
ZAR 53,305 ZAR
View
B+
Retailer 20
-
£2,501 GBP
€3,192 EUR
View
B
Retailer 21
-
£3,105 GBP
$4,160 USD
View
B
Retailer 22
-
£3,510 GBP
View
Most Expensive
B
NZ Jewellers
e078e873-9f50-4920-a8bd-3bfb5172cd0b · Oct 30
£4,188 GBP
$5,612 USD
View
22 more retailers have this diamond
Prices start from £1,605 GBPSave up to £2,584 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
£1,605 GBP