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Oval|Natural|GIA

1.20ct I SI1 Oval Natural Diamond

ID • I/SI1 • GIA 6521715530

Certificate GIA 6521715530

Diamond specifications and retailer prices

From £1,788 GBP
As of November 6, 2026
Save £2,268 GBP (56%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,056 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6521715530. Listed at 21 retailers as of November 5, 2026, with prices from £1,788 to £4,056, a £2,268 spread on the same certified stone. NZ Jewellers lists it at £4,056. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6521715530
Dimensions8.25 × 5.99 × 3.75 mm
L/W Ratio1.38
Top View
8.25 mm5.99 mm1.20 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6521715530
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 62.6%

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: £4,056 GBP|Low: £1,788 GBP|High: £4,128 GBP|Avg: £2,640 GBP|-1.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 6, 2026
Retailer 8£1,788 GBP
Retailer 2£1,858 GBP
Retailer 6£2,134 GBP
Retailer 17£2,144 GBP
Retailer 10£2,149 GBP
Retailer 19£2,241 GBP
Retailer 13£2,259 GBP
Retailer 5£2,328 GBP
Retailer 11£2,369 GBP
Retailer 15£2,394 GBP
Retailer 20£2,418 GBP
Retailer 4£2,435 GBP
Retailer 14£2,491 GBP
Retailer 7£2,518 GBP
Retailer 9£2,687 GBP
Retailer 3£2,725 GBP
Retailer 12£2,729 GBP
Retailer 16£2,841 GBP
Retailer 18£3,883 GBP
NZ Jewellers£4,056 GBP

22 data points across 20 retailers

21 retailers£1,788 GBP to £4,056 GBP

A
Cheapest Retailer
-
£1,788 GBP
A
Retailer 2
-
£1,858 GBP
View
B+
Retailer 3
-
£2,134 GBP
View
B+
Retailer 4
-
£2,144 GBP
View
B+
Retailer 5
-
£2,149 GBP
View
Final sale: no returns
B+
Retailer 6
-
£2,241 GBP
View
B+
Retailer 7
-
£2,257 GBP
View
B+
Retailer 8
-
£2,259 GBP
View
B+
Retailer 9
-
£2,328 GBP
View
Retailer 10
-
£2,369 GBP
View
Price last confirmed 12 days ago
B+
Retailer 11
-
£2,394 GBP
View
B+
Retailer 12
-
£2,418 GBP
View
B+
Retailer 13
-
£2,435 GBP
View
B+
Retailer 14
-
£2,491 GBP
View
B+
Retailer 15
-
£2,518 GBP
View
Retailer 16
-
£2,562 GBP
View
Price last confirmed 33 days ago
B+
Retailer 17
-
£2,687 GBP
View
B+
Retailer 18
-
£2,725 GBP
View
B+
Retailer 19
-
£2,841 GBP
View
B
Retailer 20
-
£3,883 GBP
View
Most Expensive
B
NZ Jewellers
4acfd102-0c1c-4864-8d6f-9646c81ca9b4 · Nov 5
£4,056 GBP
$5,429 USD
View
20 more retailers have this diamond
Prices start from £1,788 GBPSave up to £2,268 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
£1,788 GBP