Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 5496992775

Shape and cutting style on the report: Round brilliant

Certificate GIA 5496992775

Diamond specifications and retailer prices

From £1,549 GBP
$2,076 USD
As of October 30, 2026
Save £744 GBP (32%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £4,236 GBP at NZ Jewellers · As of October 20, 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 5496992775. Listed at 23 retailers as of October 30, 2026, with a 48% 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 angle35°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 5496992775
Dimensions6.83 × 6.79 × 4.26 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
6.83 mm6.79 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5496992775
Side View
Table 56.0%Crown 35°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £4,236 GBP|Low: £1,251 GBP|High: £4,236 GBP|Avg: £1,986 GBP|+16.6%
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
Retailer 16
Retailer 17
Retailer 18
October 31, 2026
Retailer 9£1,277 GBP
Retailer 3£1,500 GBP
Retailer 7£1,549 GBP
Retailer 10£1,563 GBP
Retailer 5£1,612 GBP
Retailer 4£1,658 GBP
Retailer 12£1,661 GBP
Retailer 18£1,770 GBP
Retailer 13£1,933 GBP
Retailer 11£2,105 GBP
Retailer 17£2,105 GBP
Retailer 14£2,124 GBP
Retailer 8£2,140 GBP
Retailer 6£2,179 GBP
Retailer 2£2,294 GBP
Retailer 16£2,459 GBP
Retailer 15£3,569 GBP
NZ Jewellers£4,236 GBP

39 data points across 18 retailers

23 retailers£1,549 GBP to £2,294 GBP

Retailer 1
-
£1,500 GBP
HK$15,700 HKD
Price last confirmed 11 days ago
A
Retailer 2
-
£1,549 GBP
$2,076 USD
View
Final sale: no returns
Retailer 3
-
£1,612 GBP
$2,160 USD
View
Price last confirmed 12 days ago
Retailer 4
-
£1,658 GBP
$2,221 USD
View
Price last confirmed 15 days ago
Retailer 5
-
£1,661 GBP
$2,225 USD
View
Price last confirmed 11 days ago
Retailer 6
-
£1,674 GBP
$2,243 USD
View
Price last confirmed 104 days ago
Retailer 7
-
£1,738 GBP
$2,329 USD
View
Price last confirmed 33 days ago
Retailer 8
-
£1,770 GBP
$2,372 USD
View
Price last confirmed 11 days ago
Retailer 9
-
£1,835 GBP
$2,459 USD
View
Price last confirmed 11 days ago
Retailer 10
-
£1,835 GBP
$2,459 USD
View
Price last confirmed 16 days ago
Retailer 11
-
£1,920 GBP
$2,573 USD
View
Price last confirmed 16 days ago
Retailer 12
-
£1,933 GBP
View
Price last confirmed 11 days ago
Retailer 13
-
£2,005 GBP
$2,687 USD
View
Price last confirmed 34 days ago
B
Retailer 14
-
£2,105 GBP
$2,820 USD
View
B
Retailer 15
-
£2,105 GBP
$2,820 USD
View
Retailer 16
-
£2,124 GBP
View
Price last confirmed 12 days ago
Retailer 17
-
£2,140 GBP
A$4,411 AUD
View
Price last confirmed 24 days ago
B
Retailer 18
-
£2,179 GBP
$2,920 USD
View
B
Retailer 19
-
£2,294 GBP
€2,927 EUR
View
Retailer 20
-
£2,459 GBP
ZAR 53,238 ZAR
View
Price last confirmed 14 days ago
Retailer 21
-
£3,569 GBP
View
Price last confirmed 14 days ago
Retailer 22
-
£3,633 GBP
$4,868 USD
View
Price last confirmed 33 days ago
Most Expensive
NZ Jewellers
eff0b9ba-69b1-4e2b-a3b6-da2a36af19dc · Oct 20
£4,236 GBP
$5,676 USD
View
Price last confirmed 11 days ago
22 more retailers have this diamond
Prices start from £1,549 GBPSave up to £744 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
£1,549 GBP