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Radiant|Natural|GIA

1.51ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 6183608449

Certificate GIA 6183608449

Diamond specifications and retailer prices

From £2,917 GBP
$3,909 USD
As of November 2, 2026
Save £3,226 GBP (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £6,143 GBP at MOH London · As of October 29, 2026
View at MOH London

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 6183608449. Listed at 16 retailers as of October 29, 2026, with prices from £2,917 to £6,143, a £3,226 spread on the same certified stone. MOH London lists it at £6,143. 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6183608449
Dimensions7.34 × 5.85 × 4.09 mm
L/W Ratio1.25
Culet sizeNone
Top View
7.34 mm5.85 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6183608449
Side View
Table 65.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 69.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £6,143 GBP|Low: £2,879 GBP|High: £6,185 GBP|Avg: £3,762 GBP|+0.4%
MOH London
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
November 2, 2026
Retailer 15£2,917 GBP
Retailer 9£2,978 GBP
Retailer 3£2,997 GBP
Retailer 4£3,067 GBP
Retailer 6£3,282 GBP
Retailer 5£3,660 GBP
Retailer 14£3,669 GBP
Retailer 8£3,830 GBP
Retailer 11£3,868 GBP
Retailer 10£3,903 GBP
Retailer 13£3,903 GBP
Retailer 12£4,030 GBP
Retailer 2£4,094 GBP
Retailer 7£4,235 GBP
MOH London£6,143 GBP

43 data points across 15 retailers

16 retailers£2,917 GBP to £6,143 GBP

A
Cheapest Retailer
-
£2,917 GBP
$3,909 USD
Retailer 2
-
£2,978 GBP
$3,990 USD
View
Price last confirmed 12 days ago
A
Retailer 3
-
£2,997 GBP
$4,016 USD
View
A
Retailer 4
-
£3,067 GBP
$4,110 USD
View
A
Retailer 5
-
£3,169 GBP
A$6,533 AUD
View
A
Retailer 6
-
£3,282 GBP
CA$6,108 CAD
View
A
Retailer 7
-
£3,660 GBP
$4,904 USD
View
A
Retailer 8
-
£3,669 GBP
$4,916 USD
View
A
Retailer 9
-
£3,830 GBP
View
Retailer 10
-
£3,868 GBP
A$7,973 AUD
View
Price last confirmed 23 days ago
B+
Retailer 11
-
£3,903 GBP
$5,230 USD
View
B+
Retailer 12
-
£3,903 GBP
$5,230 USD
View
B+
Retailer 13
-
£4,030 GBP
$5,400 USD
View
B+
Retailer 14
-
£4,094 GBP
€5,224 EUR
View
Retailer 15
-
£4,235 GBP
$5,674 USD
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
308625714 · Oct 29
£6,143 GBP
View
15 more retailers have this diamond
Prices start from £2,917 GBPSave up to £3,226 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
£2,917 GBP