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Oval|Natural|GIA

1.20ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 1543029754

Certificate GIA 1543029754

Diamond specifications and retailer prices

From £994 GBP
HK$10,400 HKD
As of October 30, 2026
Save £2,339 GBP (70%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,332 GBP at NZ Jewellers · As of October 30, 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 1543029754. Listed at 10 retailers as of October 30, 2026, with prices from £994 to £3,332, a £2,339 spread on the same certified stone. NZ Jewellers lists it at £3,332. 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
Pavilion angle35.13°
OriginNatural
Grading LabGIA
CertificateGIA 1543029754
Dimensions8.19 × 5.84 × 3.71 mm
L/W Ratio1.40
Key to symbols
Crystal, Knot, Feather, Needle
Top View
8.19 mm5.84 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1543029754
Side View
Table 60.0%CrownGirdle: STK-THKPavilion 35.13°Culet: NoneDepth 63.5%

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: Oct 30
Current: £3,332 GBP|Low: £994 GBP|High: £3,332 GBP|Avg: £1,710 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
October 31, 2026
Retailer 10£994 GBP
Retailer 11£1,314 GBP
Retailer 6£1,367 GBP
Retailer 12£1,389 GBP
Retailer 9£1,395 GBP
Retailer 7£1,429 GBP
Retailer 8£1,513 GBP
Retailer 2£1,870 GBP
Retailer 4£1,924 GBP
Retailer 3£2,038 GBP
Retailer 5£2,407 GBP
NZ Jewellers£3,332 GBP

31 data points across 12 retailers

10 retailers£994 GBP to £3,332 GBP

A
Cheapest Retailer
-
£994 GBP
HK$10,400 HKD
A
Retailer 2
-
£1,314 GBP
$1,761 USD
View
A
Retailer 3
-
£1,367 GBP
$1,831 USD
View
B+
Retailer 4
-
£1,389 GBP
$1,861 USD
View
Final sale: no returns
A
Retailer 5
-
£1,395 GBP
SGD 2,526 SGD
View
A
Retailer 6
-
£1,429 GBP
$1,915 USD
View
B+
Retailer 7
-
£1,513 GBP
$2,027 USD
View
B+
Retailer 8
-
£1,870 GBP
€2,386 EUR
View
B
Retailer 9
-
£2,407 GBP
View
Most Expensive
B
NZ Jewellers
e8d40a08-bbda-461f-9049-c2ef64dd678a · Oct 30
£3,332 GBP
$4,465 USD
View
9 more retailers have this diamond
Prices start from £994 GBPSave up to £2,339 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 Oval
£994 GBP