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Round|Natural|GIA

1.20ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2554430101

Certificate GIA 2554430101

Diamond specifications and retailer prices

From £2,004 GBP
As of November 6, 2026
Save £2,299 GBP (53%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £4,605 GBP at Queensmith · As of October 28, 2026
View at Queensmith

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2554430101. Listed at 27 retailers as of November 5, 2026, with a 115% 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2554430101
Dimensions6.75 × 6.72 × 4.22 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.75 mm6.72 mm1.20 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554430101
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.7%

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: £4,605 GBP|Low: £1,893 GBP|High: £4,605 GBP|Avg: £2,921 GBP|+2.7%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 4£2,004 GBP
Retailer 3£2,065 GBP
Retailer 9£2,238 GBP
Retailer 2£2,298 GBP
Retailer 10£2,444 GBP
Retailer 12£2,444 GBP
Retailer 5£2,525 GBP
Retailer 11£2,526 GBP
Retailer 6£2,873 GBP
Retailer 8£2,881 GBP
Retailer 7£4,119 GBP
Queensmith£4,605 GBP

37 data points across 12 retailers

27 retailers£2,004 GBP to £4,303 GBP

A
Cheapest Retailer
-
£2,004 GBP
A
Retailer 2
-
£2,021 GBP
View
A
Retailer 3
-
£2,065 GBP
View
Final sale: no returns
Retailer 4
-
£2,238 GBP
View
Price last confirmed 8 days ago
Retailer 5
-
£2,238 GBP
View
Price last confirmed 49 days ago
Retailer 6
-
£2,238 GBP
View
Price last confirmed 29 days ago
Retailer 7
-
£2,238 GBP
View
Price last confirmed 15 days ago
Retailer 8
-
£2,238 GBP
View
Price last confirmed 29 days ago
B+
Retailer 9
-
£2,256 GBP
View
B+
Retailer 10
-
£2,298 GBP
View
Retailer 11
-
£2,323 GBP
View
Price last confirmed 38 days ago
B+
Retailer 12
-
£2,444 GBP
View
B+
Retailer 13
-
£2,444 GBP
View
B+
Retailer 14
-
£2,525 GBP
View
B+
Retailer 15
-
£2,526 GBP
View
Retailer 16
-
£2,582 GBP
View
Price last confirmed 28 days ago
Retailer 17
-
£2,582 GBP
View
Price last confirmed 45 days ago
B+
Retailer 18
-
£2,582 GBP
View
Retailer 19
-
£2,864 GBP
View
Price last confirmed 24 days ago
B+
Retailer 20
-
£2,873 GBP
View
B
Retailer 21
-
£2,881 GBP
View
B
Retailer 22
-
£4,119 GBP
View
B
Retailer 23
-
£4,303 GBP
View
Retailer 24
-
£4,303 GBP
View
Price last confirmed 39 days ago
Retailer 25
-
£4,303 GBP
View
Price last confirmed 48 days ago
Retailer 26
-
£4,303 GBP
View
Price last confirmed 17 days ago
Most Expensive
Queensmith
2554430101 · Oct 28
£4,605 GBP
View
Price last confirmed 8 days ago
26 more retailers have this diamond
Prices start from £2,004 GBPSave up to £2,299 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
£2,004 GBP