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Radiant|Natural|GIA

0.81ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 2427523370

Certificate GIA 2427523370

Diamond specifications and retailer prices

From £650 GBP
HK$6,800 HKD
As of November 1, 2026
Save £1,471 GBP (69%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £2,121 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.81ct natural radiant diamond

This 0.81ct natural radiant sits in the just-under-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 2427523370. Listed at 18 retailers as of October 30, 2026, with prices from £650 to £2,121, a £1,471 spread on the same certified stone. NZ Jewellers lists it at £2,121. 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

0.81
Carat
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2427523370
Dimensions6.27 × 4.70 × 3.07 mm
L/W Ratio1.33
Top View
6.27 mm4.70 mm0.81 ctJ / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2427523370
Side View
Table 65.0%CrownGirdlePavilionCulet: NoneDepth 65.4%

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 1
Current: £2,121 GBP|Low: £640 GBP|High: £2,121 GBP|Avg: £1,013 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
Retailer 19
Retailer 20
November 1, 2026
Retailer 14£650 GBP
Retailer 7£796 GBP
Retailer 8£799 GBP
Retailer 4£802 GBP
Retailer 11£833 GBP
Retailer 10£842 GBP
Retailer 19£869 GBP
Retailer 20£869 GBP
Retailer 12£900 GBP
Retailer 18£903 GBP
Retailer 5£914 GBP
Retailer 6£966 GBP
Retailer 9£970 GBP
Retailer 13£992 GBP
Retailer 3£1,003 GBP
Retailer 2£1,096 GBP
Retailer 15£1,217 GBP
Retailer 16£1,286 GBP
Retailer 17£1,595 GBP
NZ Jewellers£2,121 GBP

26 data points across 20 retailers

18 retailers£650 GBP to £2,121 GBP

A
Cheapest Retailer
-
£650 GBP
HK$6,800 HKD
B+
Retailer 2
-
£799 GBP
$1,070 USD
View
B+
Retailer 3
-
£802 GBP
$1,075 USD
View
Final sale: no returns
B+
Retailer 4
-
£833 GBP
$1,116 USD
View
B+
Retailer 5
-
£869 GBP
$1,165 USD
View
B+
Retailer 6
-
£869 GBP
$1,165 USD
View
B+
Retailer 7
-
£900 GBP
SGD 1,629 SGD
View
B+
Retailer 8
-
£903 GBP
$1,210 USD
View
B+
Retailer 9
-
£914 GBP
$1,224 USD
View
B+
Retailer 10
-
£966 GBP
$1,295 USD
View
B+
Retailer 11
-
£970 GBP
$1,299 USD
View
B+
Retailer 12
-
£992 GBP
View
B+
Retailer 13
-
£1,003 GBP
$1,344 USD
View
B
Retailer 14
-
£1,096 GBP
View
B
Retailer 15
-
£1,217 GBP
€1,553 EUR
View
B
Retailer 16
-
£1,286 GBP
ZAR 27,840 ZAR
View
B
Retailer 17
-
£1,595 GBP
View
Most Expensive
B
NZ Jewellers
5b064324-78e0-4dad-ba6f-27894bd43aef · Oct 30
£2,121 GBP
$2,842 USD
View
17 more retailers have this diamond
Prices start from £650 GBPSave up to £1,471 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
0.81ct Radiant
£650 GBP