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Radiant|Natural|GIA

1.20ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 6565507610

Certificate GIA 6565507610

Diamond specifications and retailer prices

From £1,165 GBP
HK$12,200 HKD
As of November 1, 2026
Save £2,340 GBP (67%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,506 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.2ct natural radiant diamond

This 1.2ct 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 6565507610. Listed at 16 retailers as of October 30, 2026, with prices from £1,165 to £3,506, a £2,340 spread on the same certified stone. NZ Jewellers lists it at £3,506. 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

1.20
Carat
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6565507610
Dimensions6.90 × 5.30 × 3.70 mm
L/W Ratio1.30
Girdle conditionPolished
Top View
6.90 mm5.30 mm1.20 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6565507610
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.8%

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: £3,506 GBP|Low: £1,165 GBP|High: £3,631 GBP|Avg: £1,913 GBP|-3.5%
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
November 1, 2026
Retailer 2£1,165 GBP
Retailer 3£1,306 GBP
Retailer 4£1,490 GBP
Retailer 13£1,539 GBP
Retailer 11£1,565 GBP
Retailer 10£1,626 GBP
Retailer 8£1,637 GBP
Retailer 6£1,657 GBP
Retailer 9£1,663 GBP
Retailer 7£1,683 GBP
Retailer 12£1,769 GBP
Retailer 14£2,061 GBP
Retailer 15£2,166 GBP
Retailer 5£2,443 GBP
Retailer 16£2,953 GBP
NZ Jewellers£3,506 GBP

17 data points across 16 retailers

16 retailers£1,165 GBP to £3,506 GBP

A
Cheapest Retailer
-
£1,165 GBP
HK$12,200 HKD
A
Retailer 2
-
£1,306 GBP
$1,750 USD
View
B+
Retailer 3
-
£1,490 GBP
$1,996 USD
View
B+
Retailer 4
-
£1,539 GBP
$2,062 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,565 GBP
View
B+
Retailer 6
-
£1,626 GBP
View
B+
Retailer 7
-
£1,637 GBP
SGD 2,964 SGD
View
B+
Retailer 8
-
£1,657 GBP
$2,220 USD
View
B+
Retailer 9
-
£1,663 GBP
$2,228 USD
View
B+
Retailer 10
-
£1,683 GBP
$2,255 USD
View
B+
Retailer 11
-
£1,769 GBP
$2,370 USD
View
B+
Retailer 12
-
£2,061 GBP
ZAR 44,617 ZAR
View
B
Retailer 13
-
£2,166 GBP
€2,764 EUR
View
B
Retailer 14
-
£2,443 GBP
$3,273 USD
View
B
Retailer 15
-
£2,953 GBP
View
Most Expensive
B
NZ Jewellers
af07e346-e64d-4d8c-b76f-538465fdd05d · Oct 30
£3,506 GBP
$4,697 USD
View
15 more retailers have this diamond
Prices start from £1,165 GBPSave up to £2,340 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
1.20ct Radiant
£1,165 GBP