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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 €3,485 EUR
$3,909 USD
As of November 2, 2026
Save €3,815 EUR (52%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €7,300 EUR at MOH London · As of November 2, 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 November 2, 2026, with prices from €3,485 to €7,300, a €3,815 spread on the same certified stone. MOH London lists it at €7,300. 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: €7,300 EUR|Low: €3,440 EUR|High: €7,388 EUR|Avg: €4,495 EUR|-0.1%
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€3,485 EUR
Retailer 9€3,557 EUR
Retailer 3€3,581 EUR
Retailer 4€3,664 EUR
Retailer 6€3,921 EUR
Retailer 5€4,372 EUR
Retailer 14€4,383 EUR
Retailer 8€4,575 EUR
Retailer 11€4,620 EUR
Retailer 10€4,663 EUR
Retailer 13€4,663 EUR
Retailer 12€4,815 EUR
Retailer 2€4,890 EUR
Retailer 7€5,059 EUR
MOH London€7,300 EUR

43 data points across 15 retailers

16 retailers€3,485 EUR to €7,300 EUR

A
Cheapest Retailer
-
€3,485 EUR
$3,909 USD
Retailer 2
-
€3,557 EUR
$3,990 USD
View
Price last confirmed 12 days ago
A
Retailer 3
-
€3,581 EUR
$4,016 USD
View
A
Retailer 4
-
€3,664 EUR
$4,110 USD
View
A
Retailer 5
-
€3,786 EUR
A$6,533 AUD
View
A
Retailer 6
-
€3,921 EUR
CA$6,108 CAD
View
A
Retailer 7
-
€4,372 EUR
$4,904 USD
View
A
Retailer 8
-
€4,383 EUR
$4,916 USD
View
A
Retailer 9
-
€4,575 EUR
£4,041 GBP
View
Retailer 10
-
€4,620 EUR
A$7,973 AUD
View
Price last confirmed 23 days ago
B+
Retailer 11
-
€4,663 EUR
$5,230 USD
View
B+
Retailer 12
-
€4,663 EUR
$5,230 USD
View
B+
Retailer 13
-
€4,815 EUR
$5,400 USD
View
B+
Retailer 14
-
€4,890 EUR
View
Retailer 15
-
€5,059 EUR
$5,674 USD
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
308625714 · Nov 2
€7,300 EUR
£6,447 GBP
View
15 more retailers have this diamond
Prices start from €3,485 EURSave up to €3,815 EUR

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
€3,485 EUR