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Radiant|Natural|GIA

1.02ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 1236810838

Certificate GIA 1236810838

Diamond specifications and retailer prices

From £1,603 GBP
As of November 5, 2026
Save £2,492 GBP (61%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £4,095 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.02ct natural radiant diamond

This 1.02ct natural radiant sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1236810838. Listed at 17 retailers as of November 5, 2026, with prices from £1,603 to £4,095, a £2,492 spread on the same certified stone. NZ Jewellers lists it at £4,095. 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

1.02
Carat
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1236810838
Dimensions6.38 × 5.22 × 3.70 mm
L/W Ratio1.22
Girdle conditionPolished
Cert comments
Clouds pinpoints and surface graining are not shown.
Key to symbols
Feather, Crystal
Top View
6.38 mm5.22 mm1.02 ctJ / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 1236810838
Side View
Table 69.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 70.9%

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: Nov 5
Current: £4,095 GBP|Low: £1,638 GBP|High: £4,095 GBP|Avg: £2,210 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
November 7, 2026
Retailer 12£1,638 GBP
Retailer 11£1,712 GBP
Retailer 6£1,718 GBP
Retailer 3£1,771 GBP
Retailer 5£1,774 GBP
Retailer 7£1,774 GBP
Retailer 15£1,857 GBP
Retailer 14£1,934 GBP
Retailer 4£2,013 GBP
Retailer 2£2,072 GBP
Retailer 13£2,194 GBP
Retailer 9£2,391 GBP
Retailer 8£2,432 GBP
Retailer 10£3,422 GBP
NZ Jewellers£4,095 GBP

44 data points across 15 retailers

17 retailers£1,603 GBP to £4,095 GBP

B+
Cheapest Retailer
-
£1,603 GBP
B+
Retailer 2
-
£1,638 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,712 GBP
View
B+
Retailer 4
-
£1,718 GBP
View
B+
Retailer 5
-
£1,771 GBP
View
B+
Retailer 6
-
£1,774 GBP
View
Retailer 7
-
£1,774 GBP
View
Price last confirmed 9 days ago
B+
Retailer 8
-
£1,810 GBP
View
B
Retailer 9
-
£1,857 GBP
View
B
Retailer 10
-
£2,013 GBP
View
B
Retailer 11
-
£2,048 GBP
View
B
Retailer 12
-
£2,072 GBP
View
Retailer 13
-
£2,194 GBP
View
Price last confirmed 31 days ago
B
Retailer 14
-
£2,391 GBP
View
B
Retailer 15
-
£2,432 GBP
View
B
Retailer 16
-
£3,422 GBP
View
Most Expensive
B
NZ Jewellers
6cfd1771-c680-41ac-b95e-bfae3f91d2e6 · Nov 5
£4,095 GBP
$5,481 USD
View
16 more retailers have this diamond
Prices start from £1,603 GBPSave up to £2,492 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+
1.02ct Radiant
£1,603 GBP