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Round|Natural|GIA

1.00ct J SI1 Round Natural Diamond

VG • J/SI1 • GIA 7421614155

Certificate GIA 7421614155

Diamond specifications and retailer prices

From £1,153 GBP
As of October 31, 2026
Save £2,178 GBP (65%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £3,332 GBP at NZ Jewellers · As of November 5, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 7421614155. Listed at 20 retailers as of October 31, 2026, with prices from £1,153 to £3,332, a £2,178 spread on the same certified stone. NZ Jewellers lists it at £3,332. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7421614155
Dimensions6.30 × 6.22 × 4.01 mm
L/W Ratio1.01
Top View
6.30 mm6.22 mm1.00 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 7421614155
Side View
Table 58.0%Crown 37°Girdle: MED-THKPavilion 40.8°Culet: NoneDepth 64.0%

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 31
Current: £1,615 GBP|Low: £1,150 GBP|High: £2,826 GBP|Avg: £1,769 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8£1,153 GBP
Retailer 9£1,160 GBP
Retailer 7£1,446 GBP
Retailer 10£1,470 GBP
Retailer 1£1,615 GBP
Retailer 4£1,721 GBP
Retailer 3£1,945 GBP
Retailer 6£1,954 GBP
Retailer 2£1,959 GBP
Retailer 5£2,791 GBP

38 data points across 10 retailers

20 retailers£1,153 GBP to £3,332 GBP

A
Cheapest Retailer
-
£1,153 GBP
A
Retailer 2
-
£1,160 GBP
View
B+
Retailer 3
-
£1,409 GBP
View
Retailer 4
-
£1,421 GBP
View
Price last confirmed 82 days ago
B+
Retailer 5
-
£1,446 GBP
View
B+
Retailer 6
-
£1,470 GBP
View
Final sale: no returns
Retailer 7
-
£1,594 GBP
View
Price last confirmed 8 days ago
B
Retailer 8
-
£1,594 GBP
View
B
Retailer 9
-
£1,609 GBP
View
B
Retailer 10
-
£1,615 GBP
View
B
Retailer 11
-
£1,667 GBP
View
B
Retailer 12
-
£1,696 GBP
View
B
Retailer 13
-
£1,721 GBP
View
B
Retailer 14
-
£1,839 GBP
View
B
Retailer 15
-
£1,945 GBP
View
B
Retailer 16
-
£1,954 GBP
View
Retailer 17
-
£1,959 GBP
View
Price last confirmed 31 days ago
B
Retailer 18
-
£2,588 GBP
View
B
Retailer 19
-
£2,791 GBP
View
Most Expensive
C
NZ Jewellers
810c9545-2c13-417f-bec6-102fb59b971f · Nov 5
£3,332 GBP
$4,484 USD
View
19 more retailers have this diamond
Prices start from £1,153 GBPSave up to £2,178 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
1.00ct Round
£1,153 GBP