Oval|Natural|GIA

1.20ct J SI1 Oval Natural Diamond

ID • J/SI1 • GIA 1559636147

Certificate GIA 1559636147

Diamond specifications and retailer prices

From £2,205 GBP
$2,955 USD
As of October 30, 2026
Save £2,380 GBP (52%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: £4,777 GBP at NZ Jewellers · As of September 29, 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 1559636147. Listed at 29 retailers as of October 30, 2026, with a 108% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1559636147
Dimensions8.59 × 5.92 × 3.54 mm
L/W Ratio1.45
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Cloud, Twinning Wisp, Cavity, Needle
Top View
8.59 mm5.92 mm1.20 ctJ / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1559636147
Side View
Table 58.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 59.8%

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: £2,674 GBP|Low: £2,484 GBP|High: £4,641 GBP|Avg: £3,143 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 8£2,484 GBP
Retailer 9£2,525 GBP
Retailer 10£2,602 GBP
Retailer 1£2,674 GBP
Retailer 5£2,866 GBP
Retailer 11£2,891 GBP
Retailer 3£2,940 GBP
Retailer 7£3,210 GBP
Retailer 6£3,370 GBP
Retailer 2£4,000 GBP
Retailer 4£4,586 GBP

37 data points across 11 retailers

29 retailers£2,205 GBP to £4,586 GBP

B+
Cheapest Retailer
-
£2,205 GBP
$2,955 USD
B
Retailer 2
-
£2,333 GBP
$3,126 USD
View
B
Retailer 3
-
£2,399 GBP
$3,215 USD
View
Retailer 4
-
£2,484 GBP
$3,328 USD
View
Price last confirmed 68 days ago
Retailer 5
-
£2,484 GBP
$3,328 USD
View
Price last confirmed 41 days ago
Retailer 6
-
£2,484 GBP
$3,328 USD
View
Price last confirmed 30 days ago
B
Retailer 7
-
£2,484 GBP
$3,328 USD
View
B
Retailer 8
-
£2,494 GBP
$3,342 USD
View
B
Retailer 9
-
£2,525 GBP
CA$4,700 CAD
View
Retailer 10
-
£2,579 GBP
$3,456 USD
View
Price last confirmed 32 days ago
B
Retailer 11
-
£2,602 GBP
$3,486 USD
View
B
Retailer 12
-
£2,674 GBP
View
B
Retailer 13
-
£2,814 GBP
$3,770 USD
View
B
Retailer 14
-
£2,814 GBP
$3,770 USD
View
B
Retailer 15
-
£2,866 GBP
View
Retailer 16
-
£2,866 GBP
$3,840 USD
View
Price last confirmed 54 days ago
Retailer 17
-
£2,866 GBP
$3,840 USD
View
Price last confirmed 41 days ago
Retailer 18
-
£2,866 GBP
$3,840 USD
View
Price last confirmed 33 days ago
B
Retailer 19
-
£2,891 GBP
$3,873 USD
View
B
Retailer 20
-
£2,911 GBP
$3,900 USD
View
Retailer 21
-
£2,940 GBP
A$6,060 AUD
View
Price last confirmed 28 days ago
B
Retailer 22
-
£2,976 GBP
$3,988 USD
View
B
Retailer 23
-
£3,210 GBP
€4,096 EUR
View
B
Retailer 24
-
£3,370 GBP
ZAR 72,949 ZAR
View
B
Retailer 25
-
£4,000 GBP
$5,359 USD
View
B
Retailer 26
-
£4,586 GBP
View
Retailer 27
-
£4,777 GBP
$6,400 USD
View
Price last confirmed 51 days ago
Retailer 28
-
£4,777 GBP
$6,400 USD
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
edaa7ba8-bce8-4bff-81fa-16e451f7ab09 · Sep 29
£4,777 GBP
$6,400 USD
View
Price last confirmed 32 days ago
28 more retailers have this diamond
Prices start from £2,205 GBPSave up to £2,380 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
£2,205 GBP