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Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 5563366918

Certificate GIA 5563366918

Diamond specifications and retailer prices

From £1,790 GBP
$2,399 USD
As of October 31, 2026
Save £2,669 GBP (60%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,459 GBP at NZ Jewellers · As of October 27, 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 5563366918. Listed at 20 retailers as of October 27, 2026, with prices from £1,790 to £4,459, a £2,669 spread on the same certified stone. NZ Jewellers lists it at £4,459. 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 angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 5563366918
Dimensions6.76 × 6.71 × 4.24 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
6.76 mm6.71 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5563366918
Side View
Table 58.0%Crown 35.5°Girdle: Med. - Sli. ThickPavilion 41.2°Culet: NDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £4,459 GBP|Low: £1,790 GBP|High: £4,497 GBP|Avg: £2,362 GBP|-0.8%
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
Retailer 19
October 31, 2026
Retailer 11£1,790 GBP
Retailer 18£1,911 GBP
Retailer 19£1,940 GBP
Retailer 7£1,969 GBP
Retailer 5£2,019 GBP
Retailer 15£2,036 GBP
Retailer 8£2,090 GBP
Retailer 2£2,133 GBP
Retailer 14£2,133 GBP
Retailer 9£2,172 GBP
Retailer 16£2,215 GBP
Retailer 6£2,239 GBP
Retailer 13£2,260 GBP
Retailer 12£2,298 GBP
Retailer 3£2,461 GBP
Retailer 17£2,494 GBP
Retailer 4£2,597 GBP
Retailer 10£3,757 GBP
NZ Jewellers£4,459 GBP

20 data points across 19 retailers

20 retailers£1,790 GBP to £4,459 GBP

B+
Cheapest Retailer
-
£1,790 GBP
$2,399 USD
B+
Retailer 2
-
£1,911 GBP
$2,560 USD
View
B+
Retailer 3
-
£1,940 GBP
$2,600 USD
View
B+
Retailer 4
-
£1,969 GBP
$2,638 USD
View
Final sale: no returns
B+
Retailer 5
-
£2,019 GBP
$2,705 USD
View
B+
Retailer 6
-
£2,036 GBP
View
B+
Retailer 7
-
£2,090 GBP
$2,800 USD
View
B+
Retailer 8
-
£2,133 GBP
$2,858 USD
View
B+
Retailer 9
-
£2,133 GBP
$2,858 USD
View
B
Retailer 10
-
£2,172 GBP
$2,910 USD
View
B+
Retailer 11
-
£2,215 GBP
$2,968 USD
View
B+
Retailer 12
-
£2,239 GBP
$3,000 USD
View
B+
Retailer 13
-
£2,260 GBP
View
B
Retailer 14
-
£2,298 GBP
$3,079 USD
View
Retailer 15
-
£2,429 GBP
A$5,007 AUD
View
Price last confirmed 24 days ago
B
Retailer 16
-
£2,461 GBP
$3,298 USD
View
B
Retailer 17
-
£2,494 GBP
€3,182 EUR
View
B
Retailer 18
-
£2,597 GBP
ZAR 56,224 ZAR
View
B
Retailer 19
-
£3,757 GBP
View
Most Expensive
C
NZ Jewellers
b2f06508-a94f-49b8-95ab-fca17bc7698d · Oct 27
£4,459 GBP
$5,975 USD
View
19 more retailers have this diamond
Prices start from £1,790 GBPSave up to £2,669 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.

B+
1.20ct Round
£1,790 GBP