Round|Natural|GIA

1.20ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6545318689

Certificate GIA 6545318689

Diamond specifications and retailer prices

From £1,255 GBP
As of November 6, 2026
Save £1,630 GBP (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,453 GBP at NZ Jewellers · As of October 3, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6545318689. Listed at 18 retailers as of November 4, 2026, with a 130% 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

1.20
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6545318689
Dimensions6.83 × 6.88 × 4.14 mm
L/W Ratio1.01
Top View
6.83 mm6.88 mm1.20 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545318689
Side View
Table 58.0%Crown 34.5°Girdle: MediumPavilion 40.6°Culet: NoneDepth 60.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,302 GBP|Low: £1,236 GBP|High: £2,927 GBP|Avg: £1,782 GBP|-2.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6£1,255 GBP
Retailer 1£1,302 GBP
Retailer 4£1,570 GBP
Retailer 7£1,571 GBP
Retailer 2£1,784 GBP
Retailer 3£2,046 GBP
Retailer 5£2,885 GBP

40 data points across 7 retailers

18 retailers£1,255 GBP to £2,885 GBP

A
Cheapest Retailer
-
£1,255 GBP
A
Retailer 2
-
£1,302 GBP
View
B+
Retailer 3
-
£1,563 GBP
View
A
Retailer 4
-
£1,570 GBP
View
B+
Retailer 5
-
£1,571 GBP
View
B+
Retailer 6
-
£1,642 GBP
View
Retailer 7
-
£1,652 GBP
View
Price last confirmed 39 days ago
Retailer 8
-
£1,652 GBP
View
Price last confirmed 25 days ago
Retailer 9
-
£1,652 GBP
View
Price last confirmed 29 days ago
Retailer 10
-
£1,727 GBP
View
Price last confirmed 38 days ago
B+
Retailer 11
-
£1,741 GBP
View
B+
Retailer 12
-
£1,754 GBP
View
B+
Retailer 13
-
£1,784 GBP
View
Retailer 14
-
£1,906 GBP
View
Price last confirmed 38 days ago
B+
Retailer 15
-
£2,046 GBP
View
B
Retailer 16
-
£2,885 GBP
View
Retailer 17
-
£3,453 GBP
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
ad6de7aa-92fd-429a-8558-af53a9c48c2c · Oct 3
£3,453 GBP
$4,647 USD
View
Price last confirmed 34 days ago
17 more retailers have this diamond
Prices start from £1,255 GBPSave up to £1,630 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 Round
£1,255 GBP