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Round|Natural|GIA

1.20ct G SI2 Round Natural Diamond

EX • G/SI2 • GIA 250000309938

Certificate GIA 250000309938

Diamond specifications and retailer prices

From £1,152 GBP
As of November 3, 2026
Save £1,657 GBP (59%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £2,809 GBP at NZ Jewellers · As of November 2, 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 250000309938. Listed at 4 retailers as of November 2, 2026, with prices from £1,152 to £2,809, a £1,657 spread on the same certified stone. NZ Jewellers lists it at £2,809. 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
G
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41.1°
OriginNatural
Grading LabGIA
CertificateGIA 250000309938
Dimensions6.78 × 6.74 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.78 mm6.74 mm1.20 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 250000309938
Side View
Table 57.0%Crown 36.5°Girdle: MediumPavilion 41.1°Culet: NoneDepth 63.1%

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 3
Current: £2,809 GBP|Low: £1,152 GBP|High: £3,326 GBP|Avg: £2,246 GBP|-7.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 4£1,152 GBP
Retailer 3£1,190 GBP
Retailer 2£1,204 GBP
Retailer 7£2,080 GBP
NZ Jewellers£2,809 GBP
Retailer 6£3,147 GBP
Retailer 5£3,326 GBP

14 data points across 7 retailers

4 retailers£1,152 GBP to £2,809 GBP

A
Cheapest Retailer
-
£1,152 GBP
A
Retailer 2
-
£1,190 GBP
View
A
Retailer 3
-
£1,204 GBP
View
Most Expensive
B+
NZ Jewellers
f680204d-e014-49fa-8f08-1e75eb9ff54e · Nov 2
£2,809 GBP
$3,780 USD
View
3 more retailers have this diamond
Prices start from £1,152 GBPSave up to £1,657 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
£1,152 GBP