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Round|Natural|GIA

1.20ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 1557783394

Certificate GIA 1557783394

Diamond specifications and retailer prices

From £1,673 GBP
As of November 6, 2026
Save £2,025 GBP (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,636 GBP at NZ Jewellers · As of October 17, 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1557783394. Listed at 20 retailers as of November 4, 2026, with a 121% 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 angle33.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1557783394
Dimensions6.81 × 6.88 × 4.12 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Knot, Feather, Crystal, Needle, Indented Natural
Top View
6.81 mm6.88 mm1.20 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1557783394
Side View
Table 61.0%Crown 33.5°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 60.1%

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: £1,730 GBP|Low: £1,673 GBP|High: £4,411 GBP|Avg: £2,559 GBP|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9£1,673 GBP
Retailer 1£1,730 GBP
Retailer 2£2,046 GBP
Retailer 3£2,063 GBP
Retailer 7£2,093 GBP
Retailer 4£2,322 GBP
Retailer 5£2,333 GBP
Retailer 6£2,576 GBP
Retailer 8£3,698 GBP
Retailer 10£4,397 GBP

28 data points across 10 retailers

20 retailers£1,673 GBP to £3,698 GBP

A
Cheapest Retailer
-
£1,673 GBP
A
Retailer 2
-
£1,730 GBP
View
A
Retailer 3
-
£2,046 GBP
View
Final sale: no returns
A
Retailer 4
-
£2,063 GBP
View
B+
Retailer 5
-
£2,067 GBP
View
A
Retailer 6
-
£2,093 GBP
View
Retailer 7
-
£2,217 GBP
View
Price last confirmed 39 days ago
Retailer 8
-
£2,217 GBP
View
Price last confirmed 17 days ago
Retailer 9
-
£2,217 GBP
View
Price last confirmed 21 days ago
B+
Retailer 10
-
£2,251 GBP
View
Retailer 11
-
£2,303 GBP
View
Price last confirmed 38 days ago
B+
Retailer 12
-
£2,322 GBP
View
B+
Retailer 13
-
£2,323 GBP
View
B+
Retailer 14
-
£2,333 GBP
View
Retailer 15
-
£2,558 GBP
View
Price last confirmed 38 days ago
B+
Retailer 16
-
£2,576 GBP
View
B
Retailer 17
-
£3,698 GBP
View
Retailer 18
-
£4,397 GBP
View
Price last confirmed 9 days ago
Retailer 19
-
£4,636 GBP
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
83cf3036-ce24-4aa2-af83-8270fb94ccc4 · Oct 17
£4,636 GBP
$6,239 USD
View
Price last confirmed 20 days ago
19 more retailers have this diamond
Prices start from £1,673 GBPSave up to £2,025 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
£1,673 GBP