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Oval|Natural|GIA

1.20ct J SI1 Oval Natural Diamond

ID • J/SI1 • GIA 6561320239

Certificate GIA 6561320239

Diamond specifications and retailer prices

From £1,658 GBP
As of November 6, 2026
Save £2,577 GBP (61%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £4,235 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural oval diamond

This 1.2ct natural oval 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 6561320239. Listed at 24 retailers as of November 5, 2026, with prices from £1,658 to £4,235, a £2,577 spread on the same certified stone. NZ Jewellers lists it at £4,235. 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
FluorescenceNone
Crown angle39.6°
Pavilion angle36.4°
OriginNatural
Grading LabGIA
CertificateGIA 6561320239
Dimensions8.51 × 5.84 × 3.63 mm
L/W Ratio1.46
Girdle conditionFaceted
Culet sizeNone
Top View
8.51 mm5.84 mm1.20 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6561320239
Side View
Table 60.0%Crown 39.6°Girdle: MED-THKPavilion 36.4°Culet: NoneDepth 62.1%

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 6
Current: £4,235 GBP|Low: £1,463 GBP|High: £4,317 GBP|Avg: £2,211 GBP|-1.9%
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 10
Retailer 11
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Retailer 21
Retailer 22
Retailer 23
Retailer 24
Retailer 25
Retailer 26
Retailer 27
November 6, 2026
Retailer 10£1,463 GBP
Retailer 11£1,505 GBP
Retailer 2£1,658 GBP
Retailer 8£1,694 GBP
Retailer 15£1,722 GBP
Retailer 13£1,770 GBP
Retailer 26£1,823 GBP
Retailer 6£1,835 GBP
Retailer 12£1,839 GBP
Retailer 9£1,895 GBP
Retailer 22£1,965 GBP
Retailer 5£1,998 GBP
Retailer 20£2,025 GBP
Retailer 16£2,056 GBP
Retailer 19£2,104 GBP
Retailer 4£2,107 GBP
Retailer 7£2,107 GBP
Retailer 27£2,117 GBP
Retailer 25£2,143 GBP
Retailer 23£2,174 GBP
Retailer 14£2,219 GBP
Retailer 24£2,317 GBP
Retailer 17£2,359 GBP
Retailer 3£2,472 GBP
Retailer 21£2,478 GBP
Retailer 18£3,498 GBP
NZ Jewellers£4,235 GBP

17 data points across 27 retailers

24 retailers£1,658 GBP to £4,235 GBP

Retailer 1
-
£1,463 GBP
Price last confirmed 15 days ago
B+
Retailer 2
-
£1,658 GBP
View
B+
Retailer 3
-
£1,694 GBP
View
Final sale: no returns
Retailer 4
-
£1,722 GBP
View
Price last confirmed 19 days ago
B+
Retailer 5
-
£1,770 GBP
View
B+
Retailer 6
-
£1,823 GBP
View
B+
Retailer 7
-
£1,835 GBP
View
B
Retailer 8
-
£1,965 GBP
View
B+
Retailer 9
-
£1,998 GBP
View
Retailer 10
-
£2,025 GBP
View
Price last confirmed 21 days ago
Retailer 11
-
£2,056 GBP
View
Price last confirmed 16 days ago
Retailer 12
-
£2,104 GBP
View
Price last confirmed 21 days ago
B+
Retailer 13
-
£2,107 GBP
View
B+
Retailer 14
-
£2,107 GBP
View
B+
Retailer 15
-
£2,117 GBP
View
B+
Retailer 16
-
£2,143 GBP
View
B
Retailer 17
-
£2,174 GBP
View
Retailer 18
-
£2,219 GBP
View
Price last confirmed 16 days ago
Retailer 19
-
£2,313 GBP
View
Price last confirmed 30 days ago
B
Retailer 20
-
£2,317 GBP
View
B
Retailer 21
-
£2,472 GBP
View
B
Retailer 22
-
£2,478 GBP
View
Retailer 23
-
£3,498 GBP
View
Price last confirmed 18 days ago
Most Expensive
B
NZ Jewellers
71dc73bd-4697-4f3d-a570-6e29cd97fb4f · Nov 5
£4,235 GBP
$5,668 USD
View
23 more retailers have this diamond
Prices start from £1,658 GBPSave up to £2,577 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 Oval
£1,658 GBP