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Radiant|Natural|GIA

1.51ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 6512748750

Certificate GIA 6512748750

Diamond specifications and retailer prices

From $6,092 AUD
As of November 2, 2026
Save $4,790 AUD (44%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $10,882 AUD at NZ Jewellers · As of November 3, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6512748750. Listed at 6 retailers as of November 2, 2026, with prices from $6,092 to $10,882, a $4,790 spread on the same certified stone. NZ Jewellers lists it at $10,882. 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.29°
Pavilion angle30.13°
OriginNatural
Grading LabGIA
CertificateGIA 6512748750
Dimensions7.85 × 5.68 × 3.74 mm
L/W Ratio1.38
Top View
7.85 mm5.68 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512748750
Side View
Table 66.0%Crown 43.29°Girdle: Slightly ThickPavilion 30.13°Culet: NoneDepth 65.8%

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: $10,882 AUD|Low: $6,091 AUD|High: $11,033 AUD|Avg: $7,497 AUD|-1.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 3$6,092 AUD
Retailer 2$6,247 AUD
Retailer 5$6,247 AUD
Retailer 6$6,450 AUD
Retailer 9$6,669 AUD
Retailer 7$6,929 AUD
Retailer 8$7,079 AUD
Retailer 4$9,949 AUD
NZ Jewellers$10,882 AUD

29 data points across 9 retailers

6 retailers$6,092 AUD to $10,882 AUD

A
Cheapest Retailer
-
$6,092 AUD
A
Retailer 2
-
$6,247 AUD
View
A
Retailer 3
-
$6,247 AUD
View
A
Retailer 4
-
$6,450 AUD
View
B+
Retailer 5
-
$9,949 AUD
View
Most Expensive
B
NZ Jewellers
d94f7b69-be2e-462a-b5bf-7ce1ebfe390a · Nov 3
$10,882 AUD
$7,477 USD
View
5 more retailers have this diamond
Prices start from $6,092 AUDSave up to $4,790 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
$6,092 AUD