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Round|Natural|GIA

1.20ct H SI1 Round Natural Diamond

VG • H/SI1 • GIA 6432543536

Certificate GIA 6432543536

Diamond specifications and retailer prices

From £1,954 GBP
As of October 31, 2026
Save £2,969 GBP (60%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,923 GBP at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 6432543536. Listed at 21 retailers as of October 31, 2026, with prices from £1,954 to £4,923, a £2,969 spread on the same certified stone. Diamond Quarter lists it at £4,923. 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
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6432543536
Dimensions6.72 × 6.64 × 4.27 mm
L/W Ratio1.01
Top View
6.72 mm6.64 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6432543536
Side View
Table 55.0%Crown 36.5°Girdle: THN-THKPavilion 40.6°Culet: NoneDepth 64.0%

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: Oct 31
Current: £2,746 GBP|Low: £1,949 GBP|High: £4,554 GBP|Avg: £2,806 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 8£1,954 GBP
Retailer 9£1,979 GBP
Retailer 11£2,389 GBP
Retailer 10£2,483 GBP
Retailer 1£2,746 GBP
Retailer 4£2,767 GBP
Retailer 3£2,794 GBP
Retailer 7£2,852 GBP
Retailer 2£2,882 GBP
Retailer 5£3,284 GBP
Retailer 6£4,488 GBP

42 data points across 11 retailers

21 retailers£1,954 GBP to £4,923 GBP

A
Cheapest Retailer
-
£1,954 GBP
A
Retailer 2
-
£1,979 GBP
View
B+
Retailer 3
-
£2,337 GBP
View
B+
Retailer 4
-
£2,389 GBP
View
B+
Retailer 5
-
£2,483 GBP
View
Final sale: no returns
Retailer 6
-
£2,542 GBP
View
Price last confirmed 102 days ago
B
Retailer 7
-
£2,585 GBP
View
B
Retailer 8
-
£2,691 GBP
View
Retailer 9
-
£2,691 GBP
View
Price last confirmed 8 days ago
B
Retailer 10
-
£2,746 GBP
View
B
Retailer 11
-
£2,767 GBP
View
B
Retailer 12
-
£2,794 GBP
View
B
Retailer 13
-
£2,799 GBP
View
B
Retailer 14
-
£2,848 GBP
View
B
Retailer 15
-
£2,852 GBP
View
Retailer 16
-
£2,882 GBP
View
Price last confirmed 29 days ago
B
Retailer 17
-
£3,105 GBP
View
B
Retailer 18
-
£3,284 GBP
View
B
Retailer 19
-
£4,488 GBP
View
C
Retailer 20
-
£4,688 GBP
View
Most Expensive
C
Diamond Quarter
1.2SI1H64364817N · Nov 5
£4,923 GBP
View
20 more retailers have this diamond
Prices start from £1,954 GBPSave up to £2,969 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
£1,954 GBP