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Radiant|Natural|GIA

1.51ct L SI1 Radiant Natural Diamond

EX • L/SI1 • GIA 1449667553

Certificate GIA 1449667553

Diamond specifications and retailer prices

From $3,340 AUD
As of November 7, 2026
Save $803 AUD (19%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,976 AUD at NZ Jewellers · As of September 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 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 1449667553. Listed at 9 retailers as of November 6, 2026, with a relatively tight 24% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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 1449667553
Dimensions7.84 × 5.40 × 3.69 mm
L/W Ratio1.45
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.84 mm5.40 mm1.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1449667553
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 7
Current: $3,625 AUD|Low: $3,340 AUD|High: $4,669 AUD|Avg: $3,920 AUD|+2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 4$3,340 AUD
Retailer 1$3,625 AUD
Retailer 6$3,868 AUD
Retailer 3$4,072 AUD
Retailer 2$4,144 AUD
Retailer 5$4,464 AUD

45 data points across 6 retailers

9 retailers$3,340 AUD to $4,144 AUD

Retailer 1
-
$3,337 AUD
Price last confirmed 30 days ago
Retailer 2
-
$3,337 AUD
View
Price last confirmed 30 days ago
B+
Retailer 3
-
$3,340 AUD
View
Retailer 4
-
$3,492 AUD
View
Price last confirmed 38 days ago
B+
Retailer 5
-
$3,625 AUD
View
Retailer 6
-
$3,851 AUD
View
Price last confirmed 39 days ago
B+
Retailer 7
-
$4,072 AUD
View
B+
Retailer 8
-
$4,144 AUD
View
Most Expensive
NZ Jewellers
3d6cd66b-cbdb-42bf-9e35-0405328dbe8f · Sep 30
$6,976 AUD
$4,793 USD
View
Price last confirmed 37 days ago
8 more retailers have this diamond
Prices start from $3,340 AUDSave up to $803 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.

B+
1.51ct Radiant
$3,340 AUD