CaratHunter
Plans
Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 7561487212

Certificate GIA 7561487212

Diamond specifications and retailer prices

From $4,680 AUD
As of November 6, 2026
Save $6,401 AUD (58%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $11,681 AUD at NZ Jewellers · As of October 9, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7561487212. Listed at 18 retailers as of November 5, 2026, with a 137% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7561487212
Dimensions7.29 × 7.24 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
7.29 mm7.24 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7561487212
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

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: $11,081 AUD|Low: $4,625 AUD|High: $11,681 AUD|Avg: $6,987 AUD|-5.1%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 18$4,680 AUD
Retailer 10$5,043 AUD
Retailer 17$5,204 AUD
Retailer 19$5,595 AUD
Retailer 4$5,628 AUD
Retailer 6$5,871 AUD
Retailer 14$5,877 AUD
Retailer 13$5,888 AUD
Retailer 9$5,984 AUD
Retailer 5$6,175 AUD
Retailer 7$6,528 AUD
Retailer 3$6,718 AUD
Retailer 12$6,925 AUD
Retailer 11$7,192 AUD
Retailer 15$7,760 AUD
Retailer 8$7,945 AUD
Retailer 2$9,827 AUD
Retailer 16$10,102 AUD
NZ Jewellers$11,081 AUD

27 data points across 19 retailers

18 retailers$4,680 AUD to $11,081 AUD

A
Cheapest Retailer
-
$4,680 AUD
Retailer 2
-
$5,043 AUD
View
Price last confirmed 23 days ago
A
Retailer 3
-
$5,204 AUD
View
A
Retailer 4
-
$5,595 AUD
View
A
Retailer 5
-
$5,628 AUD
View
B+
Retailer 6
-
$5,871 AUD
View
Final sale: no returns
B+
Retailer 7
-
$5,877 AUD
View
B+
Retailer 8
-
$5,888 AUD
View
B+
Retailer 9
-
$5,984 AUD
View
B+
Retailer 10
-
$6,175 AUD
View
B+
Retailer 11
-
$6,528 AUD
View
B+
Retailer 12
-
$6,718 AUD
View
B+
Retailer 13
-
$6,925 AUD
View
B
Retailer 14
-
$7,760 AUD
View
B
Retailer 15
-
$9,827 AUD
View
B
Retailer 16
-
$10,102 AUD
View
B
Retailer 17
-
$11,081 AUD
View
Most Expensive
NZ Jewellers
576f1a53-d4c8-45e6-8ec8-5f967e3b2114 · Oct 9
$11,681 AUD
$8,177 USD
View
Price last confirmed 28 days ago
17 more retailers have this diamond
Prices start from $4,680 AUDSave up to $6,401 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
$4,680 AUD