Oval|Natural|GIA

1.21ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 6552283770

Certificate GIA 6552283770

Diamond specifications and retailer prices

From £1,434 GBP
As of November 6, 2026
Save £2,629 GBP (65%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,516 GBP at NZ Jewellers · As of August 29, 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 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 6552283770. Listed at 12 retailers as of November 5, 2026, with a 183% 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

1.21
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552283770
Dimensions8.50 × 5.84 × 3.78 mm
L/W Ratio1.46
Key to symbols
Crystal, Feather, Needle
Top View
8.50 mm5.84 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552283770
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NDepth 64.6%

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: £4,064 GBP|Low: £1,434 GBP|High: £4,322 GBP|Avg: £2,283 GBP|-6.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9£1,434 GBP
Retailer 11£1,821 GBP
Retailer 7£1,899 GBP
Retailer 3£1,937 GBP
Retailer 10£1,943 GBP
Retailer 2£1,990 GBP
Retailer 8£2,018 GBP
Retailer 5£2,032 GBP
Retailer 4£2,402 GBP
Retailer 6£3,405 GBP
NZ Jewellers£4,064 GBP

43 data points across 11 retailers

12 retailers£1,434 GBP to £4,064 GBP

A
Cheapest Retailer
-
£1,434 GBP
A
Retailer 2
-
£1,821 GBP
View
B+
Retailer 3
-
£1,899 GBP
View
B+
Retailer 4
-
£1,937 GBP
View
Final sale: no returns
A
Retailer 5
-
£1,943 GBP
View
A
Retailer 6
-
£1,990 GBP
View
B+
Retailer 7
-
£2,018 GBP
View
B+
Retailer 8
-
£2,032 GBP
View
B+
Retailer 9
-
£2,402 GBP
View
B
Retailer 10
-
£3,405 GBP
View
B
Retailer 11
-
£4,064 GBP
View
Most Expensive
NZ Jewellers
a330f66e-dd63-4f15-9621-4abb9fa4b7bd · Aug 29
£4,516 GBP
$6,044 USD
View
Price last confirmed 69 days ago
11 more retailers have this diamond
Prices start from £1,434 GBPSave up to £2,629 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
1.21ct Oval
£1,434 GBP