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Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 6522977444

Certificate GIA 6522977444

Diamond specifications and retailer prices

From $9,188 AUD
As of November 6, 2026
Save $11,509 AUD (56%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: $20,697 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 H 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 6522977444. Listed at 30 retailers as of November 5, 2026, with prices from $9,188 to $20,697, a $11,509 spread on the same certified stone. NZ Jewellers lists it at $20,697. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6522977444
Dimensions7.64 × 5.66 × 3.77 mm
L/W Ratio1.35
Top View
7.64 mm5.66 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6522977444
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.7%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $11,570 AUD|Low: $9,777 AUD|High: $17,453 AUD|Avg: $12,820 AUD|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 5$9,777 AUD
Retailer 8$9,894 AUD
Retailer 1$11,570 AUD
Retailer 2$11,597 AUD
Retailer 7$11,872 AUD
Retailer 3$13,444 AUD
Retailer 4$15,097 AUD
Retailer 6$17,198 AUD

37 data points across 8 retailers

30 retailers$9,188 AUD to $20,697 AUD

B+
Cheapest Retailer
-
$9,188 AUD
B+
Retailer 2
-
$9,601 AUD
View
B+
Retailer 3
-
$9,633 AUD
View
B+
Retailer 4
-
$9,777 AUD
View
B+
Retailer 5
-
$9,894 AUD
View
Final sale: no returns
B+
Retailer 6
-
$9,932 AUD
View
B+
Retailer 7
-
$10,217 AUD
View
B+
Retailer 8
-
$10,348 AUD
View
Retailer 9
-
$10,348 AUD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$10,435 AUD
View
B
Retailer 11
-
$11,022 AUD
View
B+
Retailer 12
-
$11,211 AUD
View
B+
Retailer 13
-
$11,383 AUD
View
B+
Retailer 14
-
$11,445 AUD
View
B+
Retailer 15
-
$11,570 AUD
View
B+
Retailer 16
-
$11,581 AUD
View
B+
Retailer 17
-
$11,597 AUD
View
B
Retailer 18
-
$11,854 AUD
View
Retailer 19
-
$11,872 AUD
View
Price last confirmed 16 days ago
B
Retailer 20
-
$12,356 AUD
View
B
Retailer 21
-
$12,356 AUD
View
B
Retailer 22
-
$12,499 AUD
View
B
Retailer 23
-
$12,764 AUD
View
B
Retailer 24
-
$12,936 AUD
View
B
Retailer 25
-
$13,444 AUD
View
Retailer 26
-
$13,628 AUD
View
Price last confirmed 15 days ago
B
Retailer 27
-
$13,653 AUD
View
B
Retailer 28
-
$15,097 AUD
View
B
Retailer 29
-
$17,198 AUD
View
Most Expensive
B
NZ Jewellers
187c7af1-6df5-4fe3-81b8-deb2d3b7cfab · Nov 5
$20,697 AUD
$14,221 USD
View
29 more retailers have this diamond
Prices start from $9,188 AUDSave up to $11,509 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
$9,188 AUD