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Radiant|Natural|GIA

1.51ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 5393568057

Certificate GIA 5393568057

Diamond specifications and retailer prices

From £2,738 GBP
HK$28,700 HKD
As of November 1, 2026
Save £3,699 GBP (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £6,437 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5393568057. Listed at 16 retailers as of October 30, 2026, with prices from £2,738 to £6,437, a £3,699 spread on the same certified stone. NZ Jewellers lists it at £6,437. 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
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5393568057
Dimensions7.41 × 5.65 × 3.88 mm
L/W Ratio1.31
Top View
7.41 mm5.65 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5393568057
Side View
Table 66.0%CrownGirdle: SLI-THKPavilionCulet: NoneDepth 68.8%

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: £6,437 GBP|Low: £2,718 GBP|High: £6,437 GBP|Avg: £3,919 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 13£2,738 GBP
Retailer 6£3,081 GBP
Retailer 9£3,222 GBP
Retailer 4£3,277 GBP
Retailer 3£3,410 GBP
Retailer 2£3,604 GBP
Retailer 11£3,674 GBP
Retailer 14£3,695 GBP
Retailer 15£3,695 GBP
Retailer 16£3,695 GBP
Retailer 7£3,741 GBP
Retailer 5£3,808 GBP
Retailer 10£4,180 GBP
Retailer 17£4,263 GBP
Retailer 8£4,496 GBP
Retailer 12£5,885 GBP
NZ Jewellers£6,437 GBP

26 data points across 17 retailers

16 retailers£2,738 GBP to £6,437 GBP

A
Cheapest Retailer
-
£2,738 GBP
HK$28,700 HKD
A
Retailer 2
-
£3,222 GBP
$4,324 USD
View
A
Retailer 3
-
£3,277 GBP
$4,397 USD
View
B+
Retailer 4
-
£3,410 GBP
$4,576 USD
View
Final sale: no returns
Retailer 5
-
£3,485 GBP
SGD 6,320 SGD
View
Price last confirmed 7 days ago
A
Retailer 6
-
£3,604 GBP
View
A
Retailer 7
-
£3,674 GBP
View
B+
Retailer 8
-
£3,695 GBP
$4,958 USD
View
A
Retailer 9
-
£3,695 GBP
$4,958 USD
View
A
Retailer 10
-
£3,695 GBP
$4,958 USD
View
B+
Retailer 11
-
£3,741 GBP
$5,020 USD
View
B+
Retailer 12
-
£3,808 GBP
$5,110 USD
View
B+
Retailer 13
-
£4,180 GBP
€5,342 EUR
View
B+
Retailer 14
-
£4,263 GBP
$5,721 USD
View
B
Retailer 15
-
£5,885 GBP
View
Most Expensive
B
NZ Jewellers
968484e3-63f5-41a0-b601-95c083e8afb6 · Oct 30
£6,437 GBP
$8,638 USD
View
15 more retailers have this diamond
Prices start from £2,738 GBPSave up to £3,699 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
£2,738 GBP