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Radiant|Natural|GIA

1.51ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1242094668

Certificate GIA 1242094668

Diamond specifications and retailer prices

From $6,315 AUD
As of November 6, 2026
Save $8,216 AUD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $14,531 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1242094668. Listed at 8 retailers as of November 5, 2026, with prices from $6,315 to $14,531, a $8,216 spread on the same certified stone. NZ Jewellers lists it at $14,531. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle62.19°
OriginNatural
Grading LabGIA
CertificateGIA 1242094668
Dimensions7.67 × 5.78 × 3.99 mm
L/W Ratio1.33
Key to symbols
Crystal, Pinpoint
Top View
7.67 mm5.78 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1242094668
Side View
Table 65.0%CrownGirdle: STK-THKPavilion 62.19°Culet: NoneDepth 69.1%

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: $14,531 AUD|Low: $6,315 AUD|High: $14,845 AUD|Avg: $9,613 AUD|-2.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 3$6,315 AUD
Retailer 8$7,356 AUD
Retailer 4$8,109 AUD
Retailer 2$8,594 AUD
Retailer 6$8,687 AUD
Retailer 7$9,138 AUD
Retailer 5$12,764 AUD
NZ Jewellers$14,531 AUD

17 data points across 8 retailers

8 retailers$6,315 AUD to $14,531 AUD

A
Cheapest Retailer
-
$6,315 AUD
Retailer 2
-
$7,356 AUD
View
Price last confirmed 11 days ago
A
Retailer 3
-
$8,109 AUD
View
B+
Retailer 4
-
$8,594 AUD
View
B+
Retailer 5
-
$8,687 AUD
View
B+
Retailer 6
-
$9,138 AUD
View
B
Retailer 7
-
$12,764 AUD
View
Most Expensive
B
NZ Jewellers
ee47447a-7f7b-4857-bbf4-0902d1e940e3 · Nov 5
$14,531 AUD
$9,984 USD
View
7 more retailers have this diamond
Prices start from $6,315 AUDSave up to $8,216 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
$6,315 AUD