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Oval|Natural|GIA

1.20ct K SI1 Oval Natural Diamond

GD • K/SI1 • GIA 5556637102

Certificate GIA 5556637102

Diamond specifications and retailer prices

From £1,214 GBP
As of November 5, 2026
Save £2,129 GBP (64%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,343 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5556637102. Listed at 15 retailers as of November 5, 2026, with prices from £1,214 to £3,343, a £2,129 spread on the same certified stone. NZ Jewellers lists it at £3,343. 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
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle41.8°
Pavilion angle38.3°
OriginNatural
Grading LabGIA
CertificateGIA 5556637102
Dimensions8.28 × 5.83 × 3.78 mm
L/W Ratio1.42
Girdle conditionFaceted
Top View
8.28 mm5.83 mm1.20 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5556637102
Side View
Table 65.0%Crown 41.8°Girdle: THN-THKPavilion 38.3°Culet: NoneDepth 64.8%

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 5
Current: £3,343 GBP|Low: £1,214 GBP|High: £3,494 GBP|Avg: £1,777 GBP|-4.3%
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
November 6, 2026
Retailer 12£1,214 GBP
Retailer 7£1,232 GBP
Retailer 15£1,309 GBP
Retailer 11£1,337 GBP
Retailer 5£1,403 GBP
Retailer 14£1,449 GBP
Retailer 6£1,470 GBP
Retailer 9£1,479 GBP
Retailer 4£1,515 GBP
Retailer 10£1,671 GBP
Retailer 8£1,727 GBP
Retailer 13£1,951 GBP
Retailer 2£2,171 GBP
Retailer 3£2,821 GBP
NZ Jewellers£3,343 GBP

33 data points across 15 retailers

15 retailers£1,214 GBP to £3,343 GBP

A
Cheapest Retailer
-
£1,214 GBP
B+
Retailer 2
-
£1,232 GBP
View
B+
Retailer 3
-
£1,309 GBP
View
B+
Retailer 4
-
£1,337 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,403 GBP
View
B+
Retailer 6
-
£1,449 GBP
View
Retailer 7
-
£1,470 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£1,479 GBP
View
B+
Retailer 9
-
£1,515 GBP
View
B+
Retailer 10
-
£1,671 GBP
View
B
Retailer 11
-
£1,727 GBP
View
B
Retailer 12
-
£1,951 GBP
View
B
Retailer 13
-
£2,171 GBP
View
B
Retailer 14
-
£2,821 GBP
View
Most Expensive
C
NZ Jewellers
df2af19c-e29f-41ac-baf8-281f35e77658 · Nov 5
£3,343 GBP
$4,474 USD
View
14 more retailers have this diamond
Prices start from £1,214 GBPSave up to £2,129 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
£1,214 GBP