Round|Natural|GIA

1.20ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2547087793

Certificate GIA 2547087793

Diamond specifications and retailer prices

From £1,357 GBP
As of November 6, 2026
Save £1,772 GBP (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £3,736 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2547087793. Listed at 20 retailers as of November 2, 2026, with a 131% 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2547087793
Dimensions6.85 × 6.79 × 4.16 mm
L/W Ratio1.01
Top View
6.85 mm6.79 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2547087793
Side View
Table 60.0%Crown 35.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 61.0%

Caratlytics Score

How it works →
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: £1,409 GBP|Low: £1,348 GBP|High: £3,168 GBP|Avg: £1,984 GBP|-2.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8£1,357 GBP
Retailer 1£1,409 GBP
Retailer 5£1,582 GBP
Retailer 9£1,685 GBP
Retailer 6£1,879 GBP
Retailer 2£1,886 GBP
Retailer 4£2,181 GBP
Retailer 3£2,214 GBP
Retailer 7£3,130 GBP

36 data points across 9 retailers

20 retailers£1,357 GBP to £3,130 GBP

A
Cheapest Retailer
-
£1,357 GBP
A
Retailer 2
-
£1,409 GBP
View
A
Retailer 3
-
£1,582 GBP
View
B+
Retailer 4
-
£1,685 GBP
View
B+
Retailer 5
-
£1,694 GBP
View
B+
Retailer 6
-
£1,696 GBP
View
Retailer 7
-
£1,787 GBP
View
Price last confirmed 39 days ago
Retailer 8
-
£1,787 GBP
View
Price last confirmed 25 days ago
Retailer 9
-
£1,787 GBP
View
Price last confirmed 29 days ago
B+
Retailer 10
-
£1,838 GBP
View
Retailer 11
-
£1,869 GBP
View
Price last confirmed 38 days ago
B+
Retailer 12
-
£1,879 GBP
View
B+
Retailer 13
-
£1,886 GBP
View
B+
Retailer 14
-
£1,891 GBP
View
Retailer 15
-
£2,061 GBP
View
Price last confirmed 38 days ago
B
Retailer 16
-
£2,181 GBP
View
B+
Retailer 17
-
£2,214 GBP
View
B
Retailer 18
-
£3,130 GBP
View
Retailer 19
-
£3,736 GBP
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
ed50b4da-f898-4935-9ff3-8953f76d5939 · Oct 3
£3,736 GBP
$5,000 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from £1,357 GBPSave up to £1,772 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
£1,357 GBP