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Radiant|Natural|GIA

1.51ct E SI2 Radiant Natural Diamond

EX • E/SI2 • GIA 6551551304

Certificate GIA 6551551304

Diamond specifications and retailer prices

From £3,047 GBP
HK$31,700 HKD
As of October 29, 2026
Save £3,867 GBP (56%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £6,914 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551551304. Listed at 17 retailers as of October 28, 2026, with prices from £3,047 to £6,914, a £3,867 spread on the same certified stone. Queensmith lists it at £6,914. 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
E
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551551304
Dimensions7.68 × 5.89 × 4.08 mm
L/W Ratio1.30
Girdle conditionPolished
Culet sizeNone
Key to symbols
Cloud, Feather, Crystal, Knot, Cavity, Needle
Top View
7.68 mm5.89 mm1.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551551304
Side View
Table 69.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.2%

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: Oct 29
Current: £6,914 GBP|Low: £3,047 GBP|High: £6,943 GBP|Avg: £4,321 GBP|+0.1%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 3£3,047 GBP
Retailer 5£3,302 GBP
Retailer 8£3,601 GBP
Retailer 10£3,744 GBP
Retailer 9£3,789 GBP
Retailer 4£3,915 GBP
Retailer 2£4,006 GBP
Retailer 12£4,106 GBP
Retailer 11£4,221 GBP
Retailer 7£4,640 GBP
Retailer 6£6,575 GBP
Queensmith£6,914 GBP

33 data points across 12 retailers

17 retailers£3,047 GBP to £6,914 GBP

A
Cheapest Retailer
-
£3,047 GBP
HK$31,700 HKD
A
Retailer 2
-
£3,302 GBP
₹418,836 INR
View
A
Retailer 3
-
£3,601 GBP
SGD 6,481 SGD
View
A
Retailer 4
-
£3,744 GBP
$4,986 USD
View
A
Retailer 5
-
£3,789 GBP
$5,046 USD
View
Final sale: no returns
A
Retailer 6
-
£3,915 GBP
SGD 7,045 SGD
View
A
Retailer 7
-
£4,006 GBP
View
Retailer 8
-
£4,106 GBP
$5,468 USD
View
Price last confirmed 22 days ago
Retailer 9
-
£4,106 GBP
$5,468 USD
View
Price last confirmed 29 days ago
Retailer 10
-
£4,106 GBP
$5,468 USD
View
Price last confirmed 22 days ago
A
Retailer 11
-
£4,221 GBP
$5,621 USD
View
A
Retailer 12
-
£4,250 GBP
A$8,708 AUD
View
A
Retailer 13
-
£4,640 GBP
€5,885 EUR
View
Retailer 14
-
£4,738 GBP
$6,309 USD
View
Price last confirmed 20 days ago
B+
Retailer 15
-
£6,575 GBP
View
Retailer 16
-
£6,867 GBP
$9,145 USD
View
Price last confirmed 30 days ago
Most Expensive
B
Queensmith
6551551304 · Oct 28
£6,914 GBP
View
16 more retailers have this diamond
Prices start from £3,047 GBPSave up to £3,867 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
£3,047 GBP