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Radiant|Natural|GIA

1.51ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 6552916146

Certificate GIA 6552916146

Diamond specifications and retailer prices

From £3,975 GBP
$5,334 USD
As of November 2, 2026
Save £3,228 GBP (45%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £7,203 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552916146. Listed at 13 retailers as of October 30, 2026, with prices from £3,975 to £7,203, a £3,228 spread on the same certified stone. NZ Jewellers lists it at £7,203. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552916146
Dimensions7.98 × 5.71 × 3.83 mm
L/W Ratio1.40
Girdle conditionPolished
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
7.98 mm5.71 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552916146
Side View
Table 66.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 67.2%

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 2
Current: £7,203 GBP|Low: £3,805 GBP|High: £7,522 GBP|Avg: £4,894 GBP|-4.2%
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
November 2, 2026
Retailer 4£3,975 GBP
Retailer 2£4,087 GBP
Retailer 3£4,110 GBP
Retailer 7£4,201 GBP
Retailer 10£4,306 GBP
Retailer 12£4,306 GBP
Retailer 13£4,306 GBP
Retailer 5£4,446 GBP
Retailer 6£4,705 GBP
Retailer 11£4,970 GBP
Retailer 9£5,292 GBP
Retailer 8£6,346 GBP
NZ Jewellers£7,203 GBP

26 data points across 13 retailers

13 retailers£3,975 GBP to £7,203 GBP

A
Cheapest Retailer
-
£3,975 GBP
$5,334 USD
Final sale: no returns
A
Retailer 2
-
£4,087 GBP
View
A
Retailer 3
-
£4,110 GBP
$5,515 USD
View
A
Retailer 4
-
£4,201 GBP
View
A
Retailer 5
-
£4,306 GBP
$5,779 USD
View
A
Retailer 6
-
£4,306 GBP
$5,779 USD
View
A
Retailer 7
-
£4,306 GBP
$5,779 USD
View
Retailer 8
-
£4,446 GBP
A$9,179 AUD
View
Price last confirmed 24 days ago
B+
Retailer 9
-
£4,705 GBP
€6,013 EUR
View
B+
Retailer 10
-
£4,970 GBP
$6,669 USD
View
B+
Retailer 11
-
£5,292 GBP
ZAR 114,716 ZAR
View
B
Retailer 12
-
£6,346 GBP
View
Most Expensive
B
NZ Jewellers
fa29a53a-a90a-4ea1-9896-b07372a6fe54 · Oct 30
£7,203 GBP
$9,666 USD
View
12 more retailers have this diamond
Prices start from £3,975 GBPSave up to £3,228 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
£3,975 GBP