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Radiant|Natural|GIA

1.51ct L SI1 Radiant Natural Diamond

EX • L/SI1 • GIA 6551369573

Certificate GIA 6551369573

Diamond specifications and retailer prices

From $3,490 AUD
As of November 6, 2026
Save $3,931 AUD (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $7,421 AUD at NZ Jewellers · As of November 5, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551369573. Listed at 10 retailers as of November 5, 2026, with prices from $3,490 to $7,421, a $3,931 spread on the same certified stone. NZ Jewellers lists it at $7,421. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551369573
Dimensions7.50 × 5.56 × 3.93 mm
L/W Ratio1.35
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Pinpoint
Top View
7.50 mm5.56 mm1.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551369573
Side View
Table 68.0%CrownGirdle: ThickPavilionCulet: NoneDepth 70.5%

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 6
Current: $7,421 AUD|Low: $3,487 AUD|High: $7,421 AUD|Avg: $4,178 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3$3,490 AUD
Retailer 10$3,529 AUD
Retailer 6$3,550 AUD
Retailer 8$3,550 AUD
Retailer 9$3,713 AUD
Retailer 2$3,755 AUD
Retailer 7$4,095 AUD
Retailer 5$4,331 AUD
Retailer 4$4,405 AUD
NZ Jewellers$7,421 AUD

37 data points across 10 retailers

10 retailers$3,490 AUD to $7,421 AUD

A
Cheapest Retailer
-
$3,490 AUD
B+
Retailer 2
-
$3,529 AUD
View
B+
Retailer 3
-
$3,550 AUD
View
Retailer 4
-
$3,550 AUD
View
Price last confirmed 13 days ago
B+
Retailer 5
-
$3,713 AUD
View
B+
Retailer 6
-
$3,755 AUD
View
B+
Retailer 7
-
$4,095 AUD
View
B
Retailer 8
-
$4,331 AUD
View
B
Retailer 9
-
$4,405 AUD
View
Most Expensive
C
NZ Jewellers
c177503c-87dd-41ac-a55e-122f567601ac · Nov 5
$7,421 AUD
$5,099 USD
View
9 more retailers have this diamond
Prices start from $3,490 AUDSave up to $3,931 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
$3,490 AUD