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Radiant|Natural|GIA

1.51ct F SI2 Radiant Natural Diamond

EX • F/SI2 • GIA 6551450041

Certificate GIA 6551450041

Diamond specifications and retailer prices

From $6,597 AUD
As of November 7, 2026
Save $5,670 AUD (46%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $12,268 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551450041. Listed at 5 retailers as of November 3, 2026, with prices from $6,597 to $12,268, a $5,670 spread on the same certified stone. NZ Jewellers lists it at $12,268. 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
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle49.99°
Pavilion angle37.17°
OriginNatural
Grading LabGIA
CertificateGIA 6551450041
Dimensions7.69 × 5.69 × 3.95 mm
L/W Ratio1.35
Girdle conditionVery Thick
Key to symbols
Crystal, Feather, Needle
Top View
7.69 mm5.69 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551450041
Side View
Table 72.0%Crown 49.99°GirdlePavilion 37.17°Culet: NoneDepth 69.5%

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 7
Current: $12,268 AUD|Low: $6,575 AUD|High: $12,684 AUD|Avg: $8,614 AUD|-3.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 6$6,575 AUD
Retailer 2$6,597 AUD
Retailer 3$6,995 AUD
Retailer 5$7,041 AUD
Retailer 4$11,214 AUD
NZ Jewellers$12,268 AUD

30 data points across 6 retailers

5 retailers$6,597 AUD to $12,268 AUD

A
Cheapest Retailer
-
$6,597 AUD
A
Retailer 2
-
$6,995 AUD
View
A
Retailer 3
-
$7,041 AUD
View
B+
Retailer 4
-
$11,214 AUD
View
Most Expensive
B
NZ Jewellers
80870a86-fca2-418a-b14a-2f2733de10a6 · Nov 3
$12,268 AUD
$8,429 USD
View
4 more retailers have this diamond
Prices start from $6,597 AUDSave up to $5,670 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
$6,597 AUD