Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

GD • J/SI2 • GIA 2546413842

Certificate GIA 2546413842

Diamond specifications and retailer prices

From £684 GBP
As of November 6, 2026
Save £990 GBP (59%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £2,205 GBP at NZ Jewellers · As of September 21, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by GIA 2546413842. Listed at 22 retailers as of November 4, 2026, with a 145% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
J
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryGood
FluorescenceFaint
Crown angle40°
Pavilion angle39.2°
OriginNatural
Grading LabGIA
CertificateGIA 2546413842
Dimensions5.99 × 6.10 × 4.02 mm
L/W Ratio1.02
Top View
5.99 mm6.10 mm1.00 ctJ / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceFaint
CertificateGIA 2546413842
Side View
Table 56.0%Crown 40°Girdle: MED-VTKPavilion 39.2°Culet: NoneDepth 66.5%

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: Nov 6
Current: £955 GBP|Low: £666 GBP|High: £1,681 GBP|Avg: £997 GBP|+2.8%
Retailer 1
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
November 6, 2026
Retailer 2£684 GBP
Retailer 3£694 GBP
Retailer 5£846 GBP
Retailer 9£850 GBP
Retailer 14£886 GBP
Retailer 4£917 GBP
Retailer 1£955 GBP
Retailer 6£987 GBP
Retailer 7£1,028 GBP
Retailer 10£1,040 GBP
Retailer 15£1,051 GBP
Retailer 8£1,099 GBP
Retailer 13£1,196 GBP
Retailer 12£1,316 GBP
Retailer 11£1,675 GBP

34 data points across 15 retailers

22 retailers£684 GBP to £1,675 GBP

B+
Cheapest Retailer
-
£684 GBP
Retailer 2
-
£694 GBP
View
Price last confirmed 17 days ago
B+
Retailer 3
-
£846 GBP
View
Final sale: no returns
B+
Retailer 4
-
£850 GBP
View
B+
Retailer 5
-
£886 GBP
View
Retailer 6
-
£904 GBP
View
Price last confirmed 60 days ago
Retailer 7
-
£904 GBP
View
Price last confirmed 44 days ago
Retailer 8
-
£917 GBP
View
Price last confirmed 17 days ago
Retailer 9
-
£926 GBP
View
Price last confirmed 22 days ago
B+
Retailer 10
-
£955 GBP
View
Retailer 11
-
£987 GBP
View
Price last confirmed 18 days ago
Retailer 12
-
£1,028 GBP
View
Price last confirmed 19 days ago
B+
Retailer 13
-
£1,040 GBP
View
Retailer 14
-
£1,043 GBP
View
Price last confirmed 60 days ago
Retailer 15
-
£1,043 GBP
View
Price last confirmed 45 days ago
B+
Retailer 16
-
£1,099 GBP
View
B+
Retailer 17
-
£1,196 GBP
View
B+
Retailer 18
-
£1,316 GBP
View
B
Retailer 19
-
£1,675 GBP
View
Retailer 20
-
£2,174 GBP
View
Price last confirmed 20 days ago
Retailer 21
-
£2,205 GBP
View
Price last confirmed 66 days ago
Most Expensive
NZ Jewellers
119b6a1e-4a2b-46c5-af8e-247e23b87533 · Sep 21
£2,205 GBP
$2,968 USD
View
Price last confirmed 45 days ago
21 more retailers have this diamond
Prices start from £684 GBPSave up to £990 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+
1.00ct Round
£684 GBP