Round|Natural|GIA

1.20ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6541062520

Certificate GIA 6541062520

Diamond specifications and retailer prices

From £2,668 GBP
SGD 4,830 SGD
As of October 31, 2026
Save £130 GBP (5%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £5,253 GBP at NZ Jewellers · As of September 28, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6541062520. Listed at 18 retailers as of October 30, 2026, with a relatively tight 5% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle33°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6541062520
Dimensions6.87 × 6.84 × 4.17 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
6.87 mm6.84 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6541062520
Side View
Table 61.0%Crown 33°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 60.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: £2,408 GBP|Low: £2,283 GBP|High: £5,103 GBP|Avg: £3,148 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 19, 2026
Retailer 2£2,283 GBP
Retailer 1£2,408 GBP
Retailer 10£2,668 GBP
Retailer 9£2,701 GBP
Retailer 11£2,782 GBP
Retailer 3£2,798 GBP
Retailer 4£2,799 GBP
Retailer 5£3,051 GBP
Retailer 12£3,233 GBP
Retailer 7£3,396 GBP
Retailer 8£3,660 GBP
Retailer 6£5,070 GBP

33 data points across 12 retailers

18 retailers£2,668 GBP to £2,798 GBP

Retailer 1
-
£2,283 GBP
HK$23,900 HKD
Price last confirmed 11 days ago
Retailer 2
-
£2,408 GBP
₹307,279 INR
View
Price last confirmed 12 days ago
A
Retailer 3
-
£2,668 GBP
SGD 4,830 SGD
View
Retailer 4
-
£2,701 GBP
$3,619 USD
View
Price last confirmed 12 days ago
Retailer 5
-
£2,739 GBP
$3,670 USD
View
Price last confirmed 23 days ago
B+
Retailer 6
-
£2,798 GBP
$3,749 USD
View
Retailer 7
-
£2,799 GBP
$3,750 USD
View
Price last confirmed 11 days ago
Retailer 8
-
£2,899 GBP
SGD 5,250 SGD
View
Price last confirmed 12 days ago
Retailer 9
-
£3,015 GBP
$4,040 USD
View
Price last confirmed 22 days ago
Retailer 10
-
£3,015 GBP
$4,040 USD
View
Price last confirmed 19 days ago
Retailer 11
-
£3,015 GBP
$4,040 USD
View
Price last confirmed 32 days ago
Retailer 12
-
£3,023 GBP
$4,050 USD
View
Price last confirmed 13 days ago
Retailer 13
-
£3,051 GBP
View
Price last confirmed 12 days ago
Retailer 14
-
£3,233 GBP
A$6,665 AUD
View
Price last confirmed 27 days ago
Retailer 15
-
£3,479 GBP
$4,662 USD
View
Price last confirmed 22 days ago
Retailer 16
-
£3,660 GBP
ZAR 79,230 ZAR
View
Price last confirmed 14 days ago
Retailer 17
-
£5,070 GBP
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
7e1079aa-910d-46f0-a4dd-76e0bf95d529 · Sep 28
£5,253 GBP
$7,039 USD
View
Price last confirmed 33 days ago
17 more retailers have this diamond
Prices start from £2,668 GBPSave up to £130 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
£2,668 GBP