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Round|Natural|GIA

1.20ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1529681089

Certificate GIA 1529681089

Diamond specifications and retailer prices

From £1,960 GBP
As of November 6, 2026
Save £2,541 GBP (56%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £4,501 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1529681089. Listed at 26 retailers as of November 5, 2026, with prices from £1,960 to £4,501, a £2,541 spread on the same certified stone. NZ Jewellers lists it at £4,501. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1529681089
Dimensions6.76 × 6.72 × 4.23 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Cert comments
Additional clouds are not shown. Additional pinpoints are not shown.
Key to symbols
Crystal, Cloud, Feather, Needle, Pinpoint
Top View
6.76 mm6.72 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1529681089
Side View
Table 57.0%Crown 36°Girdle: STK-STKPavilion 40.6°Culet: NoneDepth 62.8%

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: £4,501 GBP|Low: £1,941 GBP|High: £4,575 GBP|Avg: £2,673 GBP|-1.6%
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
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Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
Retailer 24
November 6, 2026
Retailer 22£1,960 GBP
Retailer 4£2,028 GBP
Retailer 6£2,036 GBP
Retailer 23£2,049 GBP
Retailer 3£2,064 GBP
Retailer 12£2,120 GBP
Retailer 17£2,140 GBP
Retailer 7£2,158 GBP
Retailer 9£2,275 GBP
Retailer 8£2,341 GBP
Retailer 14£2,341 GBP
Retailer 16£2,392 GBP
Retailer 11£2,431 GBP
Retailer 2£2,472 GBP
Retailer 13£2,641 GBP
Retailer 10£2,660 GBP
Retailer 15£2,660 GBP
Retailer 24£2,701 GBP
Retailer 5£2,749 GBP
Retailer 19£2,820 GBP
Retailer 18£3,154 GBP
Retailer 21£3,730 GBP
Retailer 20£4,309 GBP
NZ Jewellers£4,501 GBP

21 data points across 24 retailers

26 retailers£1,960 GBP to £4,501 GBP

A
Cheapest Retailer
-
£1,960 GBP
A
Retailer 2
-
£2,028 GBP
View
A
Retailer 3
-
£2,036 GBP
View
A
Retailer 4
-
£2,049 GBP
View
A
Retailer 5
-
£2,064 GBP
View
A
Retailer 6
-
£2,120 GBP
View
Final sale: no returns
Retailer 7
-
£2,140 GBP
View
Price last confirmed 16 days ago
A
Retailer 8
-
£2,158 GBP
View
B+
Retailer 9
-
£2,275 GBP
View
B+
Retailer 10
-
£2,341 GBP
View
Retailer 11
-
£2,341 GBP
View
Price last confirmed 8 days ago
B+
Retailer 12
-
£2,392 GBP
View
B+
Retailer 13
-
£2,431 GBP
View
B+
Retailer 14
-
£2,472 GBP
View
B+
Retailer 15
-
£2,641 GBP
View
B+
Retailer 16
-
£2,660 GBP
View
B+
Retailer 17
-
£2,660 GBP
View
B+
Retailer 18
-
£2,701 GBP
View
B+
Retailer 19
-
£2,749 GBP
View
Retailer 20
-
£2,793 GBP
View
Price last confirmed 33 days ago
B+
Retailer 21
-
£2,820 GBP
View
Retailer 22
-
£2,952 GBP
View
Price last confirmed 14 days ago
B+
Retailer 23
-
£3,154 GBP
View
B
Retailer 24
-
£3,730 GBP
View
B
Retailer 25
-
£4,309 GBP
View
Most Expensive
B
NZ Jewellers
6ce402cb-b0dc-4558-a70e-96c4bf8bd3c9 · Nov 5
£4,501 GBP
$6,025 USD
View
25 more retailers have this diamond
Prices start from £1,960 GBPSave up to £2,541 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
£1,960 GBP