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Radiant|Natural|GIA

1.51ct F SI2 Radiant Natural Diamond

EX • F/SI2 • GIA 2557449353

Certificate GIA 2557449353

Diamond specifications and retailer prices

From $6,478 AUD
As of November 2, 2026
Save $5,503 AUD (46%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $11,981 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 2557449353. Listed at 6 retailers as of November 2, 2026, with prices from $6,478 to $11,981, a $5,503 spread on the same certified stone. NZ Jewellers lists it at $11,981. 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
SymmetryVery Good
FluorescenceNone
Crown angle46.8°
Pavilion angle37.54°
OriginNatural
Grading LabGIA
CertificateGIA 2557449353
Dimensions7.70 × 5.89 × 3.85 mm
L/W Ratio1.31
Girdle conditionThick
Key to symbols
Crystal, Needle
Top View
7.70 mm5.89 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557449353
Side View
Table 70.0%Crown 46.8°GirdlePavilion 37.54°Culet: NoneDepth 65.4%

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: $11,981 AUD|Low: $6,312 AUD|High: $12,305 AUD|Avg: $8,223 AUD|-2.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 6$6,312 AUD
Retailer 7$6,348 AUD
Retailer 2$6,478 AUD
Retailer 4$6,877 AUD
Retailer 5$6,877 AUD
Retailer 3$10,950 AUD
NZ Jewellers$11,981 AUD

29 data points across 7 retailers

6 retailers$6,478 AUD to $11,981 AUD

Retailer 1
-
$6,312 AUD
Price last confirmed 21 days ago
A
Retailer 2
-
$6,478 AUD
View
A
Retailer 3
-
$6,877 AUD
View
A
Retailer 4
-
$6,877 AUD
View
B+
Retailer 5
-
$10,950 AUD
View
Most Expensive
B+
NZ Jewellers
7b1e8911-a1f6-43bf-94fe-9352a2776896 · Nov 3
$11,981 AUD
$8,232 USD
View
5 more retailers have this diamond
Prices start from $6,478 AUDSave up to $5,503 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
$6,478 AUD