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Radiant|Natural|GIA

1.51ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 6552916146

Certificate GIA 6552916146

Diamond specifications and retailer prices

From $7,611 AUD
$5,334 USD
As of November 2, 2026
Save $6,181 AUD (45%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $13,792 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 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 6552916146. Listed at 13 retailers as of October 30, 2026, with prices from $7,611 to $13,792, a $6,181 spread on the same certified stone. NZ Jewellers lists it at $13,792. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552916146
Dimensions7.98 × 5.71 × 3.83 mm
L/W Ratio1.40
Girdle conditionPolished
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
7.98 mm5.71 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552916146
Side View
Table 66.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 67.2%

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: $13,792 AUD|Low: $7,286 AUD|High: $14,403 AUD|Avg: $9,371 AUD|-4.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 4$7,611 AUD
Retailer 2$7,825 AUD
Retailer 3$7,869 AUD
Retailer 7$8,045 AUD
Retailer 10$8,246 AUD
Retailer 12$8,246 AUD
Retailer 13$8,246 AUD
Retailer 5$8,513 AUD
Retailer 6$9,009 AUD
Retailer 11$9,516 AUD
Retailer 9$10,132 AUD
Retailer 8$12,151 AUD
NZ Jewellers$13,792 AUD

26 data points across 13 retailers

13 retailers$7,611 AUD to $13,792 AUD

A
Cheapest Retailer
-
$7,611 AUD
$5,334 USD
Final sale: no returns
A
Retailer 2
-
$7,825 AUD
£4,318 GBP
View
A
Retailer 3
-
$7,869 AUD
$5,515 USD
View
A
Retailer 4
-
$8,045 AUD
£4,439 GBP
View
A
Retailer 5
-
$8,246 AUD
$5,779 USD
View
A
Retailer 6
-
$8,246 AUD
$5,779 USD
View
A
Retailer 7
-
$8,246 AUD
$5,779 USD
View
Retailer 8
-
$8,513 AUD
View
Price last confirmed 23 days ago
B+
Retailer 9
-
$9,009 AUD
€6,013 EUR
View
B+
Retailer 10
-
$9,516 AUD
$6,669 USD
View
B+
Retailer 11
-
$10,132 AUD
ZAR 114,716 ZAR
View
B
Retailer 12
-
$12,151 AUD
£6,705 GBP
View
Most Expensive
B
NZ Jewellers
fa29a53a-a90a-4ea1-9896-b07372a6fe54 · Oct 30
$13,792 AUD
$9,666 USD
View
12 more retailers have this diamond
Prices start from $7,611 AUDSave up to $6,181 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
$7,611 AUD