Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6545266568

Certificate GIA 6545266568

Diamond specifications and retailer prices

From £1,443 GBP
HK$15,100 HKD
As of October 30, 2026
Save £1,915 GBP (57%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £4,000 GBP at NZ Jewellers · As of October 3, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6545266568. Listed at 22 retailers as of October 25, 2026, with a 133% 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6545266568
Dimensions6.77 × 6.83 × 4.13 mm
L/W Ratio1.01
Top View
6.77 mm6.83 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545266568
Side View
Table 61.0%Crown 34°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 60.8%

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: Oct 30
Current: £2,033 GBP|Low: £1,443 GBP|High: £3,393 GBP|Avg: £2,098 GBP|+2.3%
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 31, 2026
Retailer 4£1,443 GBP
Retailer 7£1,530 GBP
Retailer 12£1,686 GBP
Retailer 11£1,766 GBP
Retailer 2£1,792 GBP
Retailer 6£1,821 GBP
Retailer 9£1,914 GBP
Retailer 1£2,033 GBP
Retailer 3£2,141 GBP
Retailer 8£2,330 GBP
Retailer 5£2,390 GBP
Retailer 10£3,357 GBP

34 data points across 12 retailers

22 retailers£1,443 GBP to £3,357 GBP

A
Cheapest Retailer
-
£1,443 GBP
HK$15,100 HKD
A
Retailer 2
-
£1,530 GBP
₹195,296 INR
View
B+
Retailer 3
-
£1,686 GBP
SGD 3,052 SGD
View
B+
Retailer 4
-
£1,766 GBP
$2,366 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,792 GBP
$2,401 USD
View
B+
Retailer 6
-
£1,800 GBP
$2,412 USD
View
B+
Retailer 7
-
£1,802 GBP
$2,415 USD
View
B+
Retailer 8
-
£1,821 GBP
View
Retailer 9
-
£1,914 GBP
$2,564 USD
View
Price last confirmed 33 days ago
B+
Retailer 10
-
£1,914 GBP
$2,564 USD
View
Retailer 11
-
£1,914 GBP
$2,564 USD
View
Price last confirmed 30 days ago
Retailer 12
-
£2,002 GBP
$2,682 USD
View
Price last confirmed 32 days ago
B+
Retailer 13
-
£2,018 GBP
$2,705 USD
View
B+
Retailer 14
-
£2,022 GBP
SGD 3,662 SGD
View
B+
Retailer 15
-
£2,033 GBP
View
Retailer 16
-
£2,141 GBP
A$4,414 AUD
View
Price last confirmed 25 days ago
Retailer 17
-
£2,208 GBP
$2,958 USD
View
Price last confirmed 32 days ago
B+
Retailer 18
-
£2,330 GBP
ZAR 50,437 ZAR
View
B
Retailer 19
-
£2,390 GBP
€3,050 EUR
View
B
Retailer 20
-
£3,357 GBP
View
Retailer 21
-
£4,000 GBP
$5,360 USD
View
Price last confirmed 33 days ago
Most Expensive
NZ Jewellers
f1eaef19-7cf6-4a04-beac-734430fbd376 · Oct 3
£4,000 GBP
$5,360 USD
View
Price last confirmed 28 days ago
21 more retailers have this diamond
Prices start from £1,443 GBPSave up to £1,915 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
£1,443 GBP