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Oval|Natural|GIA

1.21ct G SI1 Oval Natural Diamond

ID • G/SI1 • GIA 6511725679

Certificate GIA 6511725679

Diamond specifications and retailer prices

From £2,968 GBP
As of November 6, 2026
Save £3,282 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £6,250 GBP at NZ Jewellers · As of November 7, 2026
View at NZ Jewellers

About this 1.21ct natural oval diamond

This 1.21ct 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 6511725679. Listed at 15 retailers as of November 6, 2026, with prices from £2,968 to £6,250, a £3,282 spread on the same certified stone. NZ Jewellers lists it at £6,250. 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

1.21
Carat
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle37.47°
Pavilion angle41.17°
OriginNatural
Grading LabGIA
CertificateGIA 6511725679
Dimensions8.41 × 5.92 × 3.77 mm
L/W Ratio1.42
Top View
8.41 mm5.92 mm1.21 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6511725679
Side View
Table 62.0%Crown 37.47°GirdlePavilion 41.17°Culet: NoneDepth 63.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £6,250 GBP|Low: £2,979 GBP|High: £6,250 GBP|Avg: £3,867 GBP|+2.5%
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
November 7, 2026
Retailer 3£3,063 GBP
Retailer 8£3,103 GBP
Retailer 15£3,129 GBP
Retailer 4£3,236 GBP
Retailer 14£3,311 GBP
Retailer 2£3,502 GBP
Retailer 6£3,587 GBP
Retailer 7£3,587 GBP
Retailer 13£3,587 GBP
Retailer 16£3,616 GBP
Retailer 10£3,917 GBP
Retailer 12£4,058 GBP
Retailer 5£4,139 GBP
Retailer 11£4,377 GBP
Retailer 9£5,683 GBP
NZ Jewellers£6,250 GBP

43 data points across 16 retailers

15 retailers£2,968 GBP to £6,250 GBP

B+
Cheapest Retailer
-
£2,968 GBP
B+
Retailer 2
-
£3,063 GBP
View
B+
Retailer 3
-
£3,129 GBP
View
B+
Retailer 4
-
£3,236 GBP
View
B
Retailer 5
-
£3,311 GBP
View
Final sale: no returns
B+
Retailer 6
-
£3,502 GBP
View
B
Retailer 7
-
£3,587 GBP
View
B
Retailer 8
-
£3,587 GBP
View
B
Retailer 9
-
£3,587 GBP
View
Retailer 10
-
£3,616 GBP
View
Price last confirmed 29 days ago
B
Retailer 11
-
£4,058 GBP
View
B
Retailer 12
-
£4,139 GBP
View
B
Retailer 13
-
£4,377 GBP
View
B
Retailer 14
-
£5,683 GBP
View
Most Expensive
B
NZ Jewellers
458523b9-179c-4233-9777-1cc57f56e8aa · Nov 7
£6,250 GBP
$8,365 USD
View
14 more retailers have this diamond
Prices start from £2,968 GBPSave up to £3,282 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+
1.21ct Oval
£2,968 GBP