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Radiant|Natural|GIA

1.51ct L SI2 Radiant Natural Diamond

EX • L/SI2 • GIA 6435273121

Certificate GIA 6435273121

Diamond specifications and retailer prices

From $3,981 AUD
As of November 7, 2026
Save $1,617 AUD (29%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $8,452 AUD at NZ Jewellers · As of October 18, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6435273121. Listed at 9 retailers as of November 4, 2026, with a 41% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6435273121
Dimensions6.76 × 5.55 × 3.99 mm
L/W Ratio1.22
Top View
6.76 mm5.55 mm1.51 ctL / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6435273121
Side View
Table 66.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 71.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 7
Current: $8,452 AUD|Low: $3,819 AUD|High: $8,452 AUD|Avg: $5,178 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 4, 2026
Retailer 4$3,819 AUD
Retailer 12$3,981 AUD
Retailer 10$4,307 AUD
Retailer 7$4,851 AUD
Retailer 2$4,915 AUD
Retailer 6$5,020 AUD
Retailer 9$5,039 AUD
Retailer 11$5,060 AUD
Retailer 5$5,597 AUD
Retailer 8$5,637 AUD
Retailer 3$5,772 AUD
NZ Jewellers$8,452 AUD

28 data points across 12 retailers

9 retailers$3,981 AUD to $5,597 AUD

B+
Cheapest Retailer
-
$3,981 AUD
Retailer 2
-
$4,307 AUD
View
Price last confirmed 18 days ago
Retailer 3
-
$4,851 AUD
View
Price last confirmed 18 days ago
B
Retailer 4
-
$4,915 AUD
View
B
Retailer 5
-
$5,020 AUD
View
Retailer 6
-
$5,039 AUD
View
Price last confirmed 22 days ago
B
Retailer 7
-
$5,060 AUD
View
B
Retailer 8
-
$5,597 AUD
View
Most Expensive
NZ Jewellers
759621d4-8cbd-412f-946b-2d0f3f45db12 · Oct 18
$8,452 AUD
$5,807 USD
View
Price last confirmed 20 days ago
8 more retailers have this diamond
Prices start from $3,981 AUDSave up to $1,617 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.

B+
1.51ct Radiant
$3,981 AUD