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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 $5,578 AUD
$3,909 USD
As of November 2, 2026
Save $6,105 AUD (52%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $11,683 AUD 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 $5,578 to $11,683, a $6,105 spread on the same certified stone. MOH London lists it at $11,683. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $11,683 AUD|Low: $5,505 AUD|High: $11,824 AUD|Avg: $7,193 AUD|-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$5,578 AUD
Retailer 9$5,693 AUD
Retailer 3$5,730 AUD
Retailer 4$5,864 AUD
Retailer 6$6,275 AUD
Retailer 5$6,998 AUD
Retailer 14$7,015 AUD
Retailer 8$7,322 AUD
Retailer 11$7,395 AUD
Retailer 10$7,463 AUD
Retailer 13$7,463 AUD
Retailer 12$7,705 AUD
Retailer 2$7,827 AUD
Retailer 7$8,096 AUD
MOH London$11,683 AUD

43 data points across 15 retailers

16 retailers$5,578 AUD to $11,683 AUD

A
Cheapest Retailer
-
$5,578 AUD
$3,909 USD
Retailer 2
-
$5,693 AUD
$3,990 USD
View
Price last confirmed 12 days ago
A
Retailer 3
-
$5,730 AUD
$4,016 USD
View
A
Retailer 4
-
$5,864 AUD
$4,110 USD
View
A
Retailer 5
-
$6,059 AUD
View
A
Retailer 6
-
$6,275 AUD
CA$6,108 CAD
View
A
Retailer 7
-
$6,998 AUD
$4,904 USD
View
A
Retailer 8
-
$7,015 AUD
$4,916 USD
View
A
Retailer 9
-
$7,322 AUD
£4,041 GBP
View
Retailer 10
-
$7,395 AUD
View
Price last confirmed 23 days ago
B+
Retailer 11
-
$7,463 AUD
$5,230 USD
View
B+
Retailer 12
-
$7,463 AUD
$5,230 USD
View
B+
Retailer 13
-
$7,705 AUD
$5,400 USD
View
B+
Retailer 14
-
$7,827 AUD
€5,224 EUR
View
Retailer 15
-
$8,096 AUD
$5,674 USD
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
308625714 · Nov 2
$11,683 AUD
£6,447 GBP
View
15 more retailers have this diamond
Prices start from $5,578 AUDSave up to $6,105 AUD

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
$5,578 AUD