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Round|Natural|GIA

1.00ct J SI1 Round Natural Diamond

GD • J/SI1 • GIA 1437705735

Certificate GIA 1437705735

Diamond specifications and retailer prices

From £1,074 GBP
As of November 6, 2026
Save £2,063 GBP (66%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £3,137 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 standard cut grade and certified by GIA 1437705735. Listed at 21 retailers as of November 5, 2026, with prices from £1,074 to £3,137, a £2,063 spread on the same certified stone. NZ Jewellers lists it at £3,137. 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
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1437705735
Dimensions6.23 × 6.16 × 4.07 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Indented Natural, Natural
Top View
6.23 mm6.16 mm1.00 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1437705735
Side View
Table 56.0%Crown 37.5°Girdle: ThickPavilion 41°Culet: NoneDepth 65.7%

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: Nov 6
Current: £1,074 GBP|Low: £1,074 GBP|High: £2,660 GBP|Avg: £1,652 GBP|-3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 1£1,074 GBP
Retailer 9£1,094 GBP
Retailer 2£1,385 GBP
Retailer 11£1,393 GBP
Retailer 8£1,430 GBP
Retailer 4£1,517 GBP
Retailer 6£1,620 GBP
Retailer 5£1,831 GBP
Retailer 7£1,834 GBP
Retailer 3£1,849 GBP
Retailer 10£2,643 GBP

38 data points across 11 retailers

21 retailers£1,074 GBP to £3,137 GBP

A
Cheapest Retailer
-
£1,074 GBP
B+
Retailer 2
-
£1,094 GBP
View
B+
Retailer 3
-
£1,327 GBP
View
B+
Retailer 4
-
£1,385 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,393 GBP
View
B+
Retailer 6
-
£1,430 GBP
View
B+
Retailer 7
-
£1,462 GBP
View
Retailer 8
-
£1,500 GBP
View
Price last confirmed 8 days ago
B
Retailer 9
-
£1,500 GBP
View
B
Retailer 10
-
£1,517 GBP
View
B
Retailer 11
-
£1,527 GBP
View
B
Retailer 12
-
£1,569 GBP
View
B
Retailer 13
-
£1,603 GBP
View
B
Retailer 14
-
£1,620 GBP
View
B
Retailer 15
-
£1,731 GBP
View
B
Retailer 16
-
£1,831 GBP
View
B
Retailer 17
-
£1,834 GBP
View
Retailer 18
-
£1,849 GBP
View
Price last confirmed 32 days ago
C
Retailer 19
-
£2,588 GBP
View
Retailer 20
-
£2,643 GBP
View
Price last confirmed 8 days ago
Most Expensive
C
NZ Jewellers
e0447a58-148d-4c6f-94b5-4afb52760dae · Nov 5
£3,137 GBP
$4,222 USD
View
20 more retailers have this diamond
Prices start from £1,074 GBPSave up to £2,063 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
£1,074 GBP