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Radiant|Natural|GIA

1.51ct I SI2 Radiant Natural Diamond

VG • I/SI2 • GIA 7421144366

Certificate GIA 7421144366

Diamond specifications and retailer prices

From £2,742 GBP
HK$28,700 HKD
As of November 1, 2026
Save £3,705 GBP (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £6,447 GBP at NZ Jewellers · As of October 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 7421144366. Listed at 16 retailers as of October 30, 2026, with prices from £2,742 to £6,447, a £3,705 spread on the same certified stone. NZ Jewellers lists it at £6,447. 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

1.51
Carat
I
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7421144366
Dimensions7.15 × 5.51 × 4.00 mm
L/W Ratio1.30
Top View
7.15 mm5.51 mm1.51 ctI / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7421144366
Side View
Table 71.0%CrownGirdlePavilionCulet: NoneDepth 72.6%

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: £6,447 GBP|Low: £2,723 GBP|High: £6,447 GBP|Avg: £3,979 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
November 2, 2026
Retailer 12£2,742 GBP
Retailer 4£3,282 GBP
Retailer 3£3,415 GBP
Retailer 9£3,432 GBP
Retailer 10£3,610 GBP
Retailer 2£3,680 GBP
Retailer 14£3,700 GBP
Retailer 15£3,700 GBP
Retailer 16£3,700 GBP
Retailer 6£3,719 GBP
Retailer 7£3,747 GBP
Retailer 5£3,813 GBP
Retailer 13£4,188 GBP
Retailer 17£4,270 GBP
Retailer 8£4,503 GBP
Retailer 11£5,894 GBP
NZ Jewellers£6,447 GBP

27 data points across 17 retailers

16 retailers£2,742 GBP to £6,447 GBP

A
Cheapest Retailer
-
£2,742 GBP
HK$28,700 HKD
B+
Retailer 2
-
£3,227 GBP
$4,324 USD
View
B+
Retailer 3
-
£3,282 GBP
$4,397 USD
View
B+
Retailer 4
-
£3,415 GBP
$4,576 USD
View
Final sale: no returns
B+
Retailer 5
-
£3,490 GBP
SGD 6,320 SGD
View
B+
Retailer 6
-
£3,610 GBP
View
B+
Retailer 7
-
£3,680 GBP
View
B+
Retailer 8
-
£3,700 GBP
$4,958 USD
View
B+
Retailer 9
-
£3,700 GBP
$4,958 USD
View
B+
Retailer 10
-
£3,700 GBP
$4,958 USD
View
B+
Retailer 11
-
£3,747 GBP
$5,020 USD
View
B+
Retailer 12
-
£3,813 GBP
$5,110 USD
View
B+
Retailer 13
-
£4,188 GBP
€5,344 EUR
View
B+
Retailer 14
-
£4,270 GBP
$5,721 USD
View
B
Retailer 15
-
£5,894 GBP
View
Most Expensive
B
NZ Jewellers
40275fa9-c557-4d0a-a8b3-c15329c4584e · Oct 30
£6,447 GBP
$8,638 USD
View
15 more retailers have this diamond
Prices start from £2,742 GBPSave up to £3,705 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
£2,742 GBP