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Round|Natural|GIA

1.51ct K I1 Round Natural Diamond

EX • K/I1 • GIA 1515161633

Certificate GIA 1515161633

Diamond specifications and retailer prices

From $4,314 AUD
As of November 6, 2026
Save $5,800 AUD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $10,114 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and I1 clarity (included), with a top-tier cut grade and certified by GIA 1515161633. Listed at 8 retailers as of November 5, 2026, with prices from $4,314 to $10,114, a $5,800 spread on the same certified stone. NZ Jewellers lists it at $10,114. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
K
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1515161633
Dimensions7.27 × 7.31 × 4.56 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Crystal, Needle
Top View
7.27 mm7.31 mm1.51 ctK / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1515161633
Side View
Table 58.0%Crown 35.5°Girdle: Slightly ThickPavilion 41.2°Culet: NoneDepth 62.6%

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: $10,114 AUD|Low: $2,978 AUD|High: $10,114 AUD|Avg: $5,749 AUD
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 5, 2026
Retailer 5$2,978 AUD
Retailer 4$3,160 AUD
Retailer 6$4,314 AUD
Retailer 7$4,668 AUD
Retailer 9$5,260 AUD
Retailer 11$5,260 AUD
Retailer 8$5,461 AUD
Retailer 3$5,553 AUD
Retailer 10$6,068 AUD
Retailer 2$6,518 AUD
Retailer 12$6,907 AUD
Retailer 13$8,220 AUD
NZ Jewellers$10,114 AUD

20 data points across 13 retailers

8 retailers$4,314 AUD to $10,114 AUD

B+
Cheapest Retailer
-
$4,314 AUD
B+
Retailer 2
-
$4,668 AUD
View
B+
Retailer 3
-
$5,260 AUD
View
Retailer 4
-
$5,260 AUD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$5,461 AUD
View
B
Retailer 6
-
$6,068 AUD
View
B
Retailer 7
-
$6,518 AUD
View
Most Expensive
C
NZ Jewellers
31a47f8d-1050-4502-8e5a-31aca8388e9a · Nov 5
$10,114 AUD
$7,080 USD
View
7 more retailers have this diamond
Prices start from $4,314 AUDSave up to $5,800 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 Round
$4,314 AUD