Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1298194820

Certificate GIA 1298194820

Diamond specifications and retailer prices

From £1,716 GBP
₹218,933 INR
As of October 30, 2026
Save £788 GBP (31%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,962 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 1298194820. Listed at 19 retailers as of October 30, 2026, with a 46% 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1298194820
Dimensions6.79 × 6.71 × 4.24 mm
L/W Ratio1.01
Top View
6.79 mm6.71 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1298194820
Side View
Table 56.0%CrownGirdle: MediumPavilionCulet: NoneDepth 62.8%

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 30
Current: £3,962 GBP|Low: £1,705 GBP|High: £3,962 GBP|Avg: £2,444 GBP
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 11£1,716 GBP
Retailer 10£1,941 GBP
Retailer 9£2,037 GBP
Retailer 16£2,064 GBP
Retailer 7£2,088 GBP
Retailer 13£2,157 GBP
Retailer 8£2,213 GBP
Retailer 3£2,274 GBP
Retailer 4£2,274 GBP
Retailer 18£2,361 GBP
Retailer 14£2,370 GBP
Retailer 6£2,438 GBP
Retailer 2£2,504 GBP
Retailer 15£2,616 GBP
Retailer 5£2,623 GBP
Retailer 12£2,744 GBP
Retailer 17£3,823 GBP
NZ Jewellers£3,962 GBP

35 data points across 18 retailers

19 retailers£1,716 GBP to £2,504 GBP

B+
Cheapest Retailer
-
£1,716 GBP
₹218,933 INR
Retailer 2
-
£1,941 GBP
$2,601 USD
View
Price last confirmed 11 days ago
Retailer 3
-
£2,037 GBP
$2,729 USD
View
Price last confirmed 11 days ago
Retailer 4
-
£2,064 GBP
$2,765 USD
View
Price last confirmed 10 days ago
Retailer 5
-
£2,088 GBP
$2,798 USD
View
Price last confirmed 10 days ago
Retailer 6
-
£2,157 GBP
View
Price last confirmed 9 days ago
Retailer 7
-
£2,213 GBP
$2,965 USD
View
Price last confirmed 8 days ago
Retailer 8
-
£2,274 GBP
$3,047 USD
View
Price last confirmed 9 days ago
Retailer 9
-
£2,274 GBP
$3,047 USD
View
Price last confirmed 16 days ago
Retailer 10
-
£2,361 GBP
$3,164 USD
View
Price last confirmed 16 days ago
Retailer 11
-
£2,370 GBP
View
Price last confirmed 10 days ago
Retailer 12
-
£2,380 GBP
$3,190 USD
View
Price last confirmed 13 days ago
Retailer 13
-
£2,438 GBP
A$5,026 AUD
View
Price last confirmed 27 days ago
B
Retailer 14
-
£2,504 GBP
€3,195 EUR
View
Retailer 15
-
£2,616 GBP
View
Price last confirmed 10 days ago
Retailer 16
-
£2,623 GBP
$3,515 USD
View
Price last confirmed 11 days ago
Retailer 17
-
£2,744 GBP
ZAR 59,403 ZAR
View
Price last confirmed 9 days ago
Retailer 18
-
£3,823 GBP
View
Price last confirmed 10 days ago
Most Expensive
NZ Jewellers
09ae892f-2b49-4085-a32f-59d8319f501c · Oct 20
£3,962 GBP
$5,308 USD
View
Price last confirmed 11 days ago
18 more retailers have this diamond
Prices start from £1,716 GBPSave up to £788 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
£1,716 GBP