Oval|Natural|GIA

1.20ct I SI1 Oval Natural Diamond

VG • I/SI1 • GIA 6542158371

Certificate GIA 6542158371

Diamond specifications and retailer prices

From £2,143 GBP
As of November 4, 2026
Save £2,712 GBP (56%) vs most expensive(unlock to see where)
34 retailers carry this diamond
Most expensive: £4,855 GBP at NZ Jewellers · As of September 30, 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 6542158371. Listed at 34 retailers as of November 4, 2026, with a 127% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle39.91°
Pavilion angle39.79°
OriginNatural
Grading LabGIA
CertificateGIA 6542158371
Dimensions8.17 × 5.92 × 3.78 mm
L/W Ratio1.38
Top View
8.17 mm5.92 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6542158371
Side View
Table 59.0%Crown 39.91°Girdle: STK-THKPavilion 39.79°Culet: NoneDepth 63.8%

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 4
Current: £3,402 GBP|Low: £2,136 GBP|High: £4,717 GBP|Avg: £2,930 GBP|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 6£2,143 GBP
Retailer 10£2,330 GBP
Retailer 2£2,353 GBP
Retailer 3£2,439 GBP
Retailer 8£2,525 GBP
Retailer 9£2,863 GBP
Retailer 4£2,884 GBP
Retailer 11£2,985 GBP
Retailer 7£3,261 GBP
Retailer 1£3,402 GBP
Retailer 5£4,648 GBP

38 data points across 11 retailers

34 retailers£2,143 GBP to £4,855 GBP

B+
Cheapest Retailer
-
£2,143 GBP
B+
Retailer 2
-
£2,241 GBP
View
B+
Retailer 3
-
£2,330 GBP
View
Final sale: no returns
B+
Retailer 4
-
£2,353 GBP
View
B
Retailer 5
-
£2,439 GBP
View
Retailer 6
-
£2,525 GBP
View
Price last confirmed 30 days ago
Retailer 7
-
£2,525 GBP
View
Price last confirmed 36 days ago
Retailer 8
-
£2,525 GBP
View
Price last confirmed 15 days ago
Retailer 9
-
£2,525 GBP
View
Price last confirmed 8 days ago
Retailer 10
-
£2,525 GBP
View
Price last confirmed 21 days ago
Retailer 11
-
£2,525 GBP
View
Price last confirmed 45 days ago
B
Retailer 12
-
£2,533 GBP
View
Retailer 13
-
£2,622 GBP
View
Price last confirmed 38 days ago
B
Retailer 14
-
£2,749 GBP
View
B
Retailer 15
-
£2,749 GBP
View
B
Retailer 16
-
£2,846 GBP
View
B
Retailer 17
-
£2,863 GBP
View
Retailer 18
-
£2,863 GBP
View
Price last confirmed 28 days ago
Retailer 19
-
£2,863 GBP
View
Price last confirmed 37 days ago
B
Retailer 20
-
£2,884 GBP
View
Retailer 21
-
£2,913 GBP
View
Price last confirmed 45 days ago
Retailer 22
-
£2,913 GBP
View
Price last confirmed 38 days ago
Retailer 23
-
£2,913 GBP
View
Price last confirmed 28 days ago
Retailer 24
-
£2,913 GBP
View
Price last confirmed 16 days ago
B
Retailer 25
-
£2,913 GBP
View
Retailer 26
-
£2,985 GBP
View
Price last confirmed 29 days ago
B
Retailer 27
-
£3,017 GBP
View
B
Retailer 28
-
£3,261 GBP
View
B
Retailer 29
-
£3,402 GBP
View
B
Retailer 30
-
£4,648 GBP
View
Retailer 31
-
£4,855 GBP
View
Price last confirmed 48 days ago
Retailer 32
-
£4,855 GBP
View
Price last confirmed 17 days ago
C
Retailer 33
-
£4,855 GBP
View
Most Expensive
NZ Jewellers
5139d971-50c4-4f32-ac7c-6bcbe1b82803 · Sep 30
£4,855 GBP
$6,499 USD
View
Price last confirmed 37 days ago
33 more retailers have this diamond
Prices start from £2,143 GBPSave up to £2,712 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+
1.20ct Oval
£2,143 GBP