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Radiant|Natural|GIA

1.51ct F SI1 Radiant Natural Diamond

VG • F/SI1 • GIA 46

Certificate GIA 46

Diamond specifications and retailer prices

From $8,426 AUD
$5,905 USD
As of October 28, 2026
Save $10,268 AUD (55%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $18,694 AUD at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 9 retailers as of October 28, 2026, with prices from $8,426 to $18,694, a $10,268 spread on the same certified stone. NZ Jewellers lists it at $18,694. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
F
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 46
Dimensions7.50 × 5.75 × 3.96 mm
L/W Ratio1.30
Top View
7.50 mm5.75 mm1.51 ctF / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 46
Side View
Table 67.0%CrownGirdle: Thick to Very ThickPavilionCulet: NDepth 68.9%

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: Oct 28
Current: $18,694 AUD|Low: $7,542 AUD|High: $18,694 AUD|Avg: $10,642 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 9$7,542 AUD
Retailer 3$8,426 AUD
Retailer 8$8,911 AUD
Retailer 2$9,348 AUD
Retailer 7$10,077 AUD
Retailer 5$10,125 AUD
Retailer 6$10,282 AUD
Retailer 4$11,683 AUD
NZ Jewellers$18,694 AUD

10 data points across 9 retailers

9 retailers$8,426 AUD to $18,694 AUD

A
Cheapest Retailer
-
$8,426 AUD
$5,905 USD
B+
Retailer 2
-
$8,911 AUD
$6,245 USD
View
B+
Retailer 3
-
$9,348 AUD
$6,551 USD
View
B+
Retailer 4
-
$10,077 AUD
$7,062 USD
View
B+
Retailer 5
-
$10,125 AUD
$7,096 USD
View
B+
Retailer 6
-
$10,282 AUD
$7,206 USD
View
B
Retailer 7
-
$11,683 AUD
$8,188 USD
View
Retailer 8
-
$11,683 AUD
$8,188 USD
View
Price last confirmed 31 days ago
Most Expensive
B
NZ Jewellers
20b88096-87c3-45b6-9f27-276671eeb36d · Oct 30
$18,694 AUD
$13,101 USD
View
8 more retailers have this diamond
Prices start from $8,426 AUDSave up to $10,268 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
$8,426 AUD