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Round|Natural|GIA

1.20ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 6402308841

Certificate GIA 6402308841

Diamond specifications and retailer prices

From £1,987 GBP
As of November 6, 2026
Save £2,649 GBP (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,636 GBP at NZ Jewellers · As of November 5, 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6402308841. Listed at 15 retailers as of November 5, 2026, with prices from £1,987 to £4,636, a £2,649 spread on the same certified stone. NZ Jewellers lists it at £4,636. 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6402308841
Dimensions6.90 × 6.88 × 4.14 mm
L/W Ratio1.00
Top View
6.90 mm6.88 mm1.20 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6402308841
Side View
Table 58.0%CrownGirdlePavilionCulet: 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: £4,636 GBP|Low: £1,968 GBP|High: £4,636 GBP|Avg: £2,890 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 12£1,987 GBP
Retailer 5£2,362 GBP
Retailer 6£2,412 GBP
Retailer 4£2,456 GBP
Retailer 2£2,546 GBP
Retailer 13£2,661 GBP
Retailer 15£2,661 GBP
Retailer 7£2,667 GBP
Retailer 9£2,737 GBP
Retailer 8£2,763 GBP
Retailer 14£2,764 GBP
Retailer 3£3,071 GBP
Retailer 10£3,092 GBP
Retailer 11£4,439 GBP
NZ Jewellers£4,636 GBP

33 data points across 15 retailers

15 retailers£1,987 GBP to £4,636 GBP

A
Cheapest Retailer
-
£1,987 GBP
A
Retailer 2
-
£2,362 GBP
View
A
Retailer 3
-
£2,412 GBP
View
B+
Retailer 4
-
£2,456 GBP
View
Final sale: no returns
A
Retailer 5
-
£2,546 GBP
View
B+
Retailer 6
-
£2,661 GBP
View
Retailer 7
-
£2,661 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£2,667 GBP
View
B+
Retailer 9
-
£2,737 GBP
View
B+
Retailer 10
-
£2,763 GBP
View
B+
Retailer 11
-
£2,764 GBP
View
B+
Retailer 12
-
£3,071 GBP
View
B+
Retailer 13
-
£3,092 GBP
View
B
Retailer 14
-
£4,439 GBP
View
Most Expensive
B
NZ Jewellers
7f20be6f-6c8b-4fbf-8960-46686ad9de07 · Nov 5
£4,636 GBP
$6,240 USD
View
14 more retailers have this diamond
Prices start from £1,987 GBPSave up to £2,649 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
£1,987 GBP