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Round|Natural|GIA

1.51ct K I1 Round Natural Diamond

EX • K/I1 • GIA 5513031052

Certificate GIA 5513031052

Diamond specifications and retailer prices

From $3,017 AUD
As of November 6, 2026
Save $1,764 AUD (37%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $8,605 AUD at NZ Jewellers · As of October 27, 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 5513031052. Listed at 8 retailers as of November 5, 2026, with a 58% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SymmetryVery Good
FluorescenceMedium
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5513031052
Dimensions7.25 × 7.31 × 4.57 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.25 mm7.31 mm1.51 ctK / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5513031052
Side View
Table 58.0%Crown 35.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.8%

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: $8,605 AUD|Low: $2,998 AUD|High: $8,605 AUD|Avg: $4,691 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 3$3,017 AUD
Retailer 8$3,687 AUD
Retailer 7$3,988 AUD
Retailer 5$4,117 AUD
Retailer 4$4,274 AUD
Retailer 10$4,705 AUD
Retailer 6$4,750 AUD
Retailer 2$4,781 AUD
Retailer 9$4,897 AUD
NZ Jewellers$8,605 AUD

20 data points across 10 retailers

8 retailers$3,017 AUD to $4,781 AUD

A
Cheapest Retailer
-
$3,017 AUD
B+
Retailer 2
-
$3,687 AUD
View
B+
Retailer 3
-
$3,988 AUD
View
Retailer 4
-
$4,117 AUD
View
Price last confirmed 12 days ago
Retailer 5
-
$4,274 AUD
View
Price last confirmed 12 days ago
Retailer 6
-
$4,750 AUD
View
Price last confirmed 10 days ago
B+
Retailer 7
-
$4,781 AUD
View
Most Expensive
NZ Jewellers
80017714-a1f8-4849-9ba3-a3837ae50363 · Oct 27
$8,605 AUD
$6,024 USD
View
Price last confirmed 10 days ago
7 more retailers have this diamond
Prices start from $3,017 AUDSave up to $1,764 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 Round
$3,017 AUD