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Oval|Natural|GIA

1.23ct G SI1 Oval Natural Diamond

EX • G/SI1 • GIA 7558078140

Certificate GIA 7558078140

Diamond specifications and retailer prices

From £2,097 GBP
As of November 6, 2026
Save £1,861 GBP (47%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,958 GBP at NZ Jewellers · As of November 7, 2026
View at NZ Jewellers

About this 1.23ct natural oval diamond

This 1.23ct natural oval sits in the classic one-carat band, graded G 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 7558078140. Listed at 7 retailers as of November 6, 2026, with prices from £2,097 to £3,958, a £1,861 spread on the same certified stone. NZ Jewellers lists it at £3,958. 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

1.23
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 7558078140
Dimensions8.44 × 5.85 × 3.79 mm
L/W Ratio1.44
Key to symbols
Twinning Wisp, Crystal, Feather, Needle, Indented Natural
Top View
8.44 mm5.85 mm1.23 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 7558078140
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.7%

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: £3,958 GBP|Low: £1,872 GBP|High: £4,559 GBP|Avg: £3,028 GBP|-13.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 6£2,097 GBP
Retailer 5£2,205 GBP
Retailer 7£2,581 GBP
Retailer 3£2,659 GBP
Retailer 2£2,894 GBP
Retailer 4£3,800 GBP
NZ Jewellers£3,958 GBP

28 data points across 7 retailers

7 retailers£2,097 GBP to £3,958 GBP

A
Cheapest Retailer
-
£2,097 GBP
Final sale: no returns
A
Retailer 2
-
£2,205 GBP
View
B+
Retailer 3
-
£2,581 GBP
View
B+
Retailer 4
-
£2,659 GBP
View
B
Retailer 5
-
£2,894 GBP
View
B
Retailer 6
-
£3,800 GBP
View
Most Expensive
B
NZ Jewellers
f6a33742-cd44-4298-8f85-7f137b23fb5f · Nov 7
£3,958 GBP
$5,298 USD
View
6 more retailers have this diamond
Prices start from £2,097 GBPSave up to £1,861 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
1.23ct Oval
£2,097 GBP