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Oval|Natural|IGI

1.21ct K SI1 Oval Natural Diamond

VG • K/SI1 • IGI 823631655

Shape and cutting style on the report: Oval brilliant

Certificate IGI 823631655

Diamond specifications and retailer prices

From £1,251 GBP
As of November 1, 2026
Save £1,990 GBP (61%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,242 GBP at NZ Jewellers · As of November 5, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 823631655. Listed at 15 retailers as of November 1, 2026, with prices from £1,251 to £3,242, a £1,990 spread on the same certified stone. NZ Jewellers lists it at £3,242. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.4°
Pavilion angle36.5°
OriginNatural
Grading LabIGI
CertificateIGI 823631655
Dimensions8.50 × 5.95 × 3.64 mm
L/W Ratio1.43
Girdle conditionFaceted
Top View
8.50 mm5.95 mm1.21 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 823631655
Side View
Table 59.0%Crown 31.4°Girdle: STK-THKPavilion 36.5°Culet: NoneDepth 61.2%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £3,242 GBP|Low: £1,034 GBP|High: £3,452 GBP|Avg: £1,658 GBP|-6.1%
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 6, 2026
Retailer 8£1,034 GBP
Retailer 7£1,251 GBP
Retailer 6£1,292 GBP
Retailer 5£1,405 GBP
Retailer 14£1,418 GBP
Retailer 4£1,453 GBP
Retailer 13£1,467 GBP
Retailer 15£1,470 GBP
Retailer 2£1,518 GBP
Retailer 16£1,552 GBP
Retailer 3£1,621 GBP
Retailer 10£1,720 GBP
Retailer 11£1,910 GBP
Retailer 9£2,076 GBP
Retailer 12£2,735 GBP
NZ Jewellers£3,242 GBP

30 data points across 16 retailers

15 retailers£1,251 GBP to £3,242 GBP

B+
Cheapest Retailer
-
£1,251 GBP
B+
Retailer 2
-
£1,292 GBP
View
B+
Retailer 3
-
£1,405 GBP
View
Retailer 4
-
£1,418 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£1,453 GBP
View
B+
Retailer 6
-
£1,467 GBP
View
B+
Retailer 7
-
£1,470 GBP
View
B+
Retailer 8
-
£1,518 GBP
View
B+
Retailer 9
-
£1,552 GBP
View
B+
Retailer 10
-
£1,621 GBP
View
B
Retailer 11
-
£1,720 GBP
View
B
Retailer 12
-
£1,910 GBP
View
B
Retailer 13
-
£2,076 GBP
View
C
Retailer 14
-
£2,735 GBP
View
Most Expensive
C
NZ Jewellers
516db6b8-8eac-4ab3-ba15-a0d0fc2de4e0 · Nov 5
£3,242 GBP
$4,339 USD
View
14 more retailers have this diamond
Prices start from £1,251 GBPSave up to £1,990 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
£1,251 GBP