Round|Natural|GIA

1.20ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6545229748

Certificate GIA 6545229748

Diamond specifications and retailer prices

From £1,473 GBP
As of November 6, 2026
Save £1,910 GBP (56%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,048 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 6545229748. Listed at 21 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6545229748
Dimensions6.85 × 6.81 × 4.16 mm
L/W Ratio1.01
Top View
6.85 mm6.81 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545229748
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.0%

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: £1,526 GBP|Low: £1,473 GBP|High: £3,428 GBP|Avg: £2,151 GBP|-2.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 2£1,473 GBP
Retailer 1£1,526 GBP
Retailer 9£1,715 GBP
Retailer 3£1,853 GBP
Retailer 5£2,037 GBP
Retailer 4£2,046 GBP
Retailer 6£2,267 GBP
Retailer 8£2,363 GBP
Retailer 7£2,398 GBP
Retailer 10£3,383 GBP

26 data points across 10 retailers

21 retailers£1,473 GBP to £3,383 GBP

A
Cheapest Retailer
-
£1,473 GBP
A
Retailer 2
-
£1,526 GBP
View
B+
Retailer 3
-
£1,715 GBP
View
B+
Retailer 4
-
£1,811 GBP
View
B+
Retailer 5
-
£1,821 GBP
View
B+
Retailer 6
-
£1,823 GBP
View
B+
Retailer 7
-
£1,853 GBP
View
Retailer 8
-
£1,937 GBP
View
Price last confirmed 39 days ago
Retailer 9
-
£1,937 GBP
View
Price last confirmed 25 days ago
B+
Retailer 10
-
£1,980 GBP
View
Retailer 11
-
£2,025 GBP
View
Price last confirmed 38 days ago
B+
Retailer 12
-
£2,037 GBP
View
B
Retailer 13
-
£2,041 GBP
View
B
Retailer 14
-
£2,046 GBP
View
Retailer 15
-
£2,234 GBP
View
Price last confirmed 38 days ago
B+
Retailer 16
-
£2,267 GBP
View
B
Retailer 17
-
£2,363 GBP
View
B+
Retailer 18
-
£2,398 GBP
View
B
Retailer 19
-
£3,383 GBP
View
Retailer 20
-
£4,048 GBP
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
7345e70d-e7af-4eb5-af27-664b25f58f0f · Oct 3
£4,048 GBP
$5,418 USD
View
Price last confirmed 34 days ago
20 more retailers have this diamond
Prices start from £1,473 GBPSave up to £1,910 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
£1,473 GBP