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Radiant|Natural|GIA

1.51ct F SI1 Radiant Natural Diamond

EX • F/SI1 • GIA 6545057025

Certificate GIA 6545057025

Diamond specifications and retailer prices

From £6,013 GBP
A$12,415 AUD
As of November 2, 2026
Save £4,702 GBP (44%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £10,715 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545057025. Listed at 20 retailers as of October 30, 2026, with prices from £6,013 to £10,715, a £4,702 spread on the same certified stone. NZ Jewellers lists it at £10,715. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.53°
Pavilion angle29.05°
OriginNatural
Grading LabGIA
CertificateGIA 6545057025
Dimensions5.53 × 8.15 × 3.60 mm
L/W Ratio1.47
Top View
5.53 mm8.15 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545057025
Side View
Table 66.0%Crown 43.53°Girdle: Very ThickPavilion 29.05°Culet: NoneDepth 65.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £10,715 GBP|Low: £5,893 GBP|High: £11,051 GBP|Avg: £7,532 GBP|-3.0%
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
Retailer 18
Retailer 19
November 3, 2026
Retailer 9£6,019 GBP
Retailer 19£6,386 GBP
Retailer 5£6,429 GBP
Retailer 15£6,429 GBP
Retailer 8£6,482 GBP
Retailer 6£6,965 GBP
Retailer 2£7,028 GBP
Retailer 13£7,061 GBP
Retailer 18£7,072 GBP
Retailer 3£7,144 GBP
Retailer 4£7,593 GBP
Retailer 17£7,593 GBP
Retailer 11£7,679 GBP
Retailer 14£7,802 GBP
Retailer 16£7,847 GBP
Retailer 7£8,036 GBP
Retailer 10£8,462 GBP
Retailer 12£10,040 GBP
NZ Jewellers£10,715 GBP

42 data points across 19 retailers

20 retailers£6,013 GBP to £10,715 GBP

B+
Cheapest Retailer
-
£6,013 GBP
A$12,415 AUD
B+
Retailer 2
-
£6,019 GBP
$8,077 USD
View
B+
Retailer 3
-
£6,386 GBP
$8,570 USD
View
B+
Retailer 4
-
£6,429 GBP
$8,627 USD
View
B+
Retailer 5
-
£6,429 GBP
$8,627 USD
View
Final sale: no returns
B+
Retailer 6
-
£6,482 GBP
$8,699 USD
View
B+
Retailer 7
-
£6,965 GBP
$9,346 USD
View
B+
Retailer 8
-
£7,028 GBP
View
Retailer 9
-
£7,061 GBP
A$14,577 AUD
View
Price last confirmed 10 days ago
B+
Retailer 10
-
£7,072 GBP
$9,490 USD
View
B+
Retailer 11
-
£7,144 GBP
$9,587 USD
View
B
Retailer 12
-
£7,593 GBP
$10,190 USD
View
B
Retailer 13
-
£7,593 GBP
$10,190 USD
View
B
Retailer 14
-
£7,679 GBP
$10,305 USD
View
Retailer 15
-
£7,802 GBP
$10,470 USD
View
Price last confirmed 7 days ago
B
Retailer 16
-
£7,847 GBP
$10,530 USD
View
B
Retailer 17
-
£8,036 GBP
$10,784 USD
View
Retailer 18
-
£8,462 GBP
$11,355 USD
View
Price last confirmed 10 days ago
B
Retailer 19
-
£10,040 GBP
View
Most Expensive
B
NZ Jewellers
1e0b6c26-ff93-4381-948b-98c0c0e75016 · Oct 30
£10,715 GBP
$14,379 USD
View
19 more retailers have this diamond
Prices start from £6,013 GBPSave up to £4,702 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.

B+
1.51ct Radiant
£6,013 GBP