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Oval|Natural|GIA

1.00ct J SI1 Oval Natural Diamond

GD • J/SI1 • GIA 6375818599

Certificate GIA 6375818599

Diamond specifications and retailer prices

From £1,453 GBP
As of November 6, 2026
Save £2,622 GBP (64%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,075 GBP at NZ Jewellers · As of November 5, 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6375818599. Listed at 20 retailers as of November 5, 2026, with prices from £1,453 to £4,075, a £2,622 spread on the same certified stone. NZ Jewellers lists it at £4,075. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

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

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6375818599
Dimensions8.68 × 5.52 × 3.23 mm
L/W Ratio1.57
Top View
8.68 mm5.52 mm1.00 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6375818599
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.6%

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: £2,421 GBP|Low: £1,355 GBP|High: £3,455 GBP|Avg: £2,081 GBP|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 6£1,453 GBP
Retailer 9£1,594 GBP
Retailer 8£1,629 GBP
Retailer 7£1,632 GBP
Retailer 2£1,847 GBP
Retailer 3£2,062 GBP
Retailer 10£2,183 GBP
Retailer 4£2,379 GBP
Retailer 1£2,421 GBP
Retailer 5£3,414 GBP

45 data points across 10 retailers

20 retailers£1,453 GBP to £4,075 GBP

B+
Cheapest Retailer
-
£1,453 GBP
B
Retailer 2
-
£1,594 GBP
View
B
Retailer 3
-
£1,629 GBP
View
Final sale: no returns
B
Retailer 4
-
£1,632 GBP
View
B
Retailer 5
-
£1,703 GBP
View
B
Retailer 6
-
£1,763 GBP
View
B
Retailer 7
-
£1,765 GBP
View
Retailer 8
-
£1,765 GBP
View
Price last confirmed 8 days ago
B
Retailer 9
-
£1,847 GBP
View
B
Retailer 10
-
£2,032 GBP
View
B
Retailer 11
-
£2,032 GBP
View
B
Retailer 12
-
£2,037 GBP
View
B
Retailer 13
-
£2,062 GBP
View
B
Retailer 14
-
£2,099 GBP
View
Retailer 15
-
£2,183 GBP
View
Price last confirmed 30 days ago
B
Retailer 16
-
£2,238 GBP
View
B
Retailer 17
-
£2,379 GBP
View
B
Retailer 18
-
£2,421 GBP
View
C
Retailer 19
-
£3,414 GBP
View
Most Expensive
C
NZ Jewellers
e519cd34-a49e-4053-9f6f-69489deec606 · Nov 5
£4,075 GBP
$5,454 USD
View
19 more retailers have this diamond
Prices start from £1,453 GBPSave up to £2,622 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+
1.00ct Oval
£1,453 GBP