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Oval|Natural|GIA

1.20ct I SI2 Oval Natural Diamond

EX • I/SI2 • GIA 5242018478

Certificate GIA 5242018478

Diamond specifications and retailer prices

From £1,189 GBP
As of November 5, 2026
Save £355 GBP (23%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,000 GBP at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.2ct natural oval diamond

This 1.2ct natural oval sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5242018478. Listed at 11 retailers as of November 5, 2026, with a 30% 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

1.20
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36.95°
Pavilion angle39.38°
OriginNatural
Grading LabGIA
CertificateGIA 5242018478
Dimensions8.37 × 5.99 × 3.68 mm
L/W Ratio1.40
Culet sizeNone
Top View
8.37 mm5.99 mm1.20 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5242018478
Side View
Table 59.0%Crown 36.95°Girdle: MED-THKPavilion 39.38°Culet: NoneDepth 61.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,189 GBP|Low: £1,182 GBP|High: £2,180 GBP|Avg: £1,495 GBP|-5.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Wholesale Diamonds Direct
November 5, 2026
Retailer 1£1,189 GBP
Retailer 6£1,204 GBP
Retailer 5£1,205 GBP
Retailer 2£1,313 GBP
Retailer 3£1,340 GBP
Retailer 8£1,344 GBP
Retailer 9£1,442 GBP
Retailer 7£1,449 GBP
Retailer 10£1,592 GBP
Retailer 4£1,690 GBP
Wholesale Diamonds Direct£2,000 GBP

37 data points across 11 retailers

11 retailers£1,189 GBP to £1,544 GBP

A
Cheapest Retailer
-
£1,189 GBP
Retailer 2
-
£1,204 GBP
View
Price last confirmed 13 days ago
Retailer 3
-
£1,205 GBP
View
Price last confirmed 13 days ago
Retailer 4
-
£1,313 GBP
View
Price last confirmed 10 days ago
Retailer 5
-
£1,340 GBP
View
Price last confirmed 10 days ago
Retailer 6
-
£1,344 GBP
View
Price last confirmed 12 days ago
Retailer 7
-
£1,442 GBP
View
Price last confirmed 11 days ago
Retailer 8
-
£1,449 GBP
View
Price last confirmed 10 days ago
A
Retailer 9
-
£1,544 GBP
View
Retailer 10
-
£1,690 GBP
View
Price last confirmed 11 days ago
Most Expensive
Wholesale Diamonds Direct
495679861 · Oct 26
£2,000 GBP
$2,677 USD
View
Price last confirmed 10 days ago
10 more retailers have this diamond
Prices start from £1,189 GBPSave up to £355 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
£1,189 GBP