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Oval|Natural|GIA

1.00ct K SI1 Oval Natural Diamond

EX • K/SI1 • GIA 2558152906

Certificate GIA 2558152906

Diamond specifications and retailer prices

From £803 GBP
As of November 6, 2026
Save £713 GBP (47%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,516 GBP at With Clarity · As of November 6, 2026
View at With Clarity

About this 1ct natural oval diamond

This 1ct natural oval sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2558152906. Listed at 6 retailers as of November 6, 2026, with prices from £803 to £1,516, a £713 spread on the same certified stone. With Clarity lists it at £1,516. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2558152906
Dimensions8.15 × 5.54 × 3.33 mm
L/W Ratio1.47
Top View
8.15 mm5.54 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558152906
Side View
Table 61.0%CrownGirdle: ThickPavilionCulet: NoneDepth 60.2%

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: £998 GBP|Low: £803 GBP|High: £1,535 GBP|Avg: £1,087 GBP|-2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
With Clarity
November 6, 2026
Retailer 3£803 GBP
Retailer 5£909 GBP
Retailer 1£998 GBP
Retailer 6£1,039 GBP
Retailer 4£1,113 GBP
Retailer 2£1,158 GBP
With Clarity£1,516 GBP

13 data points across 7 retailers

6 retailers£803 GBP to £1,516 GBP

A
Cheapest Retailer
-
£803 GBP
A
Retailer 2
-
£909 GBP
View
A
Retailer 3
-
£998 GBP
View
A
Retailer 4
-
£1,113 GBP
View
B+
Retailer 5
-
£1,158 GBP
View
Most Expensive
B+
With Clarity
2558152906 · Nov 6
£1,516 GBP
$2,029 USD
View
5 more retailers have this diamond
Prices start from £803 GBPSave up to £713 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
£803 GBP