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Radiant|Natural|GIA

1.51ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 1459117061

Certificate GIA 1459117061

Diamond specifications and retailer prices

From £1,987 GBP
HK$20,800 HKD
As of November 1, 2026
Save £2,335 GBP (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,840 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two 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 1459117061. Listed at 21 retailers as of November 1, 2026, with a 118% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1459117061
Dimensions9.18 × 5.19 × 3.55 mm
L/W Ratio1.77
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
9.18 mm5.19 mm1.51 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1459117061
Side View
Table 65.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 68.4%

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: £2,131 GBP|Low: £1,968 GBP|High: £4,696 GBP|Avg: £2,847 GBP|-7.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 9£1,987 GBP
Retailer 1£2,131 GBP
Retailer 12£2,358 GBP
Retailer 13£2,385 GBP
Retailer 4£2,483 GBP
Retailer 3£2,660 GBP
Retailer 11£2,693 GBP
Retailer 7£2,701 GBP
Retailer 2£2,746 GBP
Retailer 5£2,976 GBP
Retailer 10£3,026 GBP
Retailer 8£3,177 GBP
Retailer 6£4,322 GBP

32 data points across 13 retailers

21 retailers£1,987 GBP to £4,322 GBP

A
Cheapest Retailer
-
£1,987 GBP
HK$20,800 HKD
A
Retailer 2
-
£2,131 GBP
₹271,875 INR
View
A
Retailer 3
-
£2,358 GBP
$3,159 USD
View
A
Retailer 4
-
£2,385 GBP
$3,196 USD
View
Final sale: no returns
A
Retailer 5
-
£2,483 GBP
SGD 4,495 SGD
View
A
Retailer 6
-
£2,604 GBP
$3,489 USD
View
A
Retailer 7
-
£2,605 GBP
$3,490 USD
View
A
Retailer 8
-
£2,660 GBP
SGD 4,817 SGD
View
A
Retailer 9
-
£2,693 GBP
$3,608 USD
View
A
Retailer 10
-
£2,701 GBP
View
A
Retailer 11
-
£2,746 GBP
$3,680 USD
View
B+
Retailer 12
-
£2,769 GBP
A$5,708 AUD
View
Retailer 13
-
£2,779 GBP
$3,723 USD
View
Price last confirmed 24 days ago
Retailer 14
-
£2,779 GBP
$3,723 USD
View
Price last confirmed 25 days ago
Retailer 15
-
£2,885 GBP
$3,866 USD
View
Price last confirmed 32 days ago
Retailer 16
-
£2,976 GBP
A$6,135 AUD
View
Price last confirmed 24 days ago
B+
Retailer 17
-
£3,026 GBP
€3,862 EUR
View
B+
Retailer 18
-
£3,177 GBP
ZAR 68,766 ZAR
View
Retailer 19
-
£3,205 GBP
$4,295 USD
View
Price last confirmed 23 days ago
B
Retailer 20
-
£4,322 GBP
View
Most Expensive
NZ Jewellers
034ab330-a956-44c8-ade5-01dcb0f68dbe · Sep 30
£4,840 GBP
$6,485 USD
View
Price last confirmed 32 days ago
20 more retailers have this diamond
Prices start from £1,987 GBPSave up to £2,335 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
1.51ct Radiant
£1,987 GBP