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Round|Natural|GIA

1.20ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 5241078555

Certificate GIA 5241078555

Diamond specifications and retailer prices

From £2,293 GBP
HK$24,000 HKD
As of October 31, 2026
Save £2,808 GBP (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £5,285 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5241078555. Listed at 21 retailers as of October 29, 2026, with a 122% 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 5241078555
Dimensions6.90 × 6.87 × 4.14 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Cavity, Needle
Top View
6.90 mm6.87 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5241078555
Side View
Table 60.0%Crown 32.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.2%

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: £3,729 GBP|Low: £2,293 GBP|High: £5,134 GBP|Avg: £3,325 GBP|+1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 7£2,293 GBP
Retailer 6£2,389 GBP
Retailer 13£2,656 GBP
Retailer 4£2,788 GBP
Retailer 2£2,799 GBP
Retailer 10£2,927 GBP
Retailer 3£3,033 GBP
Retailer 8£3,084 GBP
Retailer 5£3,252 GBP
Retailer 9£3,432 GBP
Retailer 1£3,729 GBP
Retailer 11£5,057 GBP
Retailer 12£5,100 GBP

26 data points across 13 retailers

21 retailers£2,293 GBP to £5,100 GBP

A
Cheapest Retailer
-
£2,293 GBP
HK$24,000 HKD
A
Retailer 2
-
£2,389 GBP
₹304,892 INR
View
B+
Retailer 3
-
£2,656 GBP
SGD 4,809 SGD
View
B+
Retailer 4
-
£2,715 GBP
$3,638 USD
View
B+
Retailer 5
-
£2,785 GBP
$3,732 USD
View
B+
Retailer 6
-
£2,788 GBP
$3,735 USD
View
B+
Retailer 7
-
£2,799 GBP
$3,751 USD
View
Final sale: no returns
Retailer 8
-
£2,887 GBP
SGD 5,227 SGD
View
Price last confirmed 10 days ago
B+
Retailer 9
-
£2,927 GBP
View
Retailer 10
-
£3,033 GBP
$4,064 USD
View
Price last confirmed 11 days ago
Retailer 11
-
£3,033 GBP
$4,064 USD
View
Price last confirmed 19 days ago
Retailer 12
-
£3,033 GBP
$4,064 USD
View
Price last confirmed 16 days ago
B+
Retailer 13
-
£3,084 GBP
View
B+
Retailer 14
-
£3,143 GBP
$4,212 USD
View
Retailer 15
-
£3,252 GBP
A$6,704 AUD
View
Price last confirmed 27 days ago
B+
Retailer 16
-
£3,432 GBP
€4,380 EUR
View
Retailer 17
-
£3,500 GBP
$4,690 USD
View
Price last confirmed 12 days ago
B+
Retailer 18
-
£3,729 GBP
ZAR 80,709 ZAR
View
Retailer 19
-
£5,057 GBP
View
Price last confirmed 9 days ago
B
Retailer 20
-
£5,100 GBP
View
Most Expensive
NZ Jewellers
8e1cc228-1a90-48dd-8d16-6e0c29b4df9c · Oct 17
£5,285 GBP
$7,081 USD
View
Price last confirmed 14 days ago
20 more retailers have this diamond
Prices start from £2,293 GBPSave up to £2,808 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
£2,293 GBP