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Oval|Natural|GIA

1.00ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 1553987872

Certificate GIA 1553987872

Diamond specifications and retailer prices

From £1,016 GBP
As of November 6, 2026
Save £2,271 GBP (69%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,647 GBP at NZ Jewellers · As of August 29, 2026
View at NZ Jewellers

About this 1ct natural oval diamond

This 1ct 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 1553987872. Listed at 12 retailers as of November 5, 2026, with a 224% 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

1.00
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1553987872
Dimensions8.16 × 5.53 × 3.44 mm
L/W Ratio1.48
Girdle conditionThick
Top View
8.16 mm5.53 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553987872
Side View
Table 55.0%CrownGirdle: MediumPavilionCulet: NoneDepth 62.2%

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 6
Current: £3,287 GBP|Low: £1,016 GBP|High: £3,447 GBP|Avg: £1,699 GBP|-4.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 2£1,016 GBP
Retailer 9£1,075 GBP
Retailer 10£1,228 GBP
Retailer 8£1,390 GBP
Retailer 11£1,450 GBP
Retailer 5£1,496 GBP
Retailer 4£1,645 GBP
Retailer 7£1,839 GBP
Retailer 3£1,866 GBP
Retailer 6£2,355 GBP
NZ Jewellers£3,287 GBP

34 data points across 11 retailers

12 retailers£1,016 GBP to £3,287 GBP

A
Cheapest Retailer
-
£1,016 GBP
A
Retailer 2
-
£1,075 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,228 GBP
View
B+
Retailer 4
-
£1,390 GBP
View
B+
Retailer 5
-
£1,450 GBP
View
B+
Retailer 6
-
£1,496 GBP
View
B+
Retailer 7
-
£1,645 GBP
View
B+
Retailer 8
-
£1,839 GBP
View
Retailer 9
-
£1,866 GBP
View
Price last confirmed 32 days ago
B
Retailer 10
-
£2,355 GBP
View
B
Retailer 11
-
£3,287 GBP
View
Most Expensive
NZ Jewellers
1efc91e5-184a-41a5-82b1-23cc35e29b1a · Aug 29
£3,647 GBP
$4,881 USD
View
Price last confirmed 69 days ago
11 more retailers have this diamond
Prices start from £1,016 GBPSave up to £2,271 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
1.00ct Oval
£1,016 GBP