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Radiant|Natural|GIA

1.51ct L SI1 Radiant Natural Diamond

EX • L/SI1 • GIA 6551369573

Certificate GIA 6551369573

Diamond specifications and retailer prices

From £1,792 GBP
As of November 6, 2026
Save £2,018 GBP (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,810 GBP at NZ Jewellers · As of November 5, 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 L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551369573. Listed at 10 retailers as of November 5, 2026, with prices from £1,792 to £3,810, a £2,018 spread on the same certified stone. NZ Jewellers lists it at £3,810. 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
L
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551369573
Dimensions7.50 × 5.56 × 3.93 mm
L/W Ratio1.35
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Pinpoint
Top View
7.50 mm5.56 mm1.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551369573
Side View
Table 68.0%CrownGirdle: ThickPavilionCulet: NoneDepth 70.5%

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 6
Current: £3,810 GBP|Low: £1,790 GBP|High: £3,810 GBP|Avg: £2,145 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3£1,792 GBP
Retailer 10£1,812 GBP
Retailer 6£1,822 GBP
Retailer 8£1,822 GBP
Retailer 9£1,906 GBP
Retailer 2£1,928 GBP
Retailer 7£2,102 GBP
Retailer 5£2,223 GBP
Retailer 4£2,262 GBP
NZ Jewellers£3,810 GBP

37 data points across 10 retailers

10 retailers£1,792 GBP to £3,810 GBP

A
Cheapest Retailer
-
£1,792 GBP
B+
Retailer 2
-
£1,812 GBP
View
B+
Retailer 3
-
£1,822 GBP
View
Retailer 4
-
£1,822 GBP
View
Price last confirmed 13 days ago
B+
Retailer 5
-
£1,906 GBP
View
B+
Retailer 6
-
£1,928 GBP
View
B+
Retailer 7
-
£2,102 GBP
View
B
Retailer 8
-
£2,223 GBP
View
B
Retailer 9
-
£2,262 GBP
View
Most Expensive
C
NZ Jewellers
c177503c-87dd-41ac-a55e-122f567601ac · Nov 5
£3,810 GBP
$5,099 USD
View
9 more retailers have this diamond
Prices start from £1,792 GBPSave up to £2,018 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
£1,792 GBP