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Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2546595232

Certificate GIA 2546595232

Diamond specifications and retailer prices

From $4,241 AUD
As of November 6, 2026
Save $5,748 AUD (58%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $9,990 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2546595232. Listed at 15 retailers as of November 5, 2026, with prices from $4,241 to $9,990, a $5,748 spread on the same certified stone. NZ Jewellers lists it at $9,990. 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
FluorescenceFaint
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2546595232
Dimensions7.25 × 7.30 × 4.57 mm
L/W Ratio1.01
Top View
7.25 mm7.30 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2546595232
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $9,990 AUD|Low: $4,206 AUD|High: $10,061 AUD|Avg: $6,180 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
Retailer 14
November 6, 2026
Retailer 11$4,241 AUD
Retailer 4$4,610 AUD
Retailer 5$4,878 AUD
Retailer 12$4,985 AUD
Retailer 3$5,194 AUD
Retailer 13$5,194 AUD
Retailer 14$5,394 AUD
Retailer 7$5,737 AUD
Retailer 6$5,994 AUD
Retailer 9$6,024 AUD
Retailer 2$6,243 AUD
Retailer 8$6,998 AUD
Retailer 10$9,587 AUD
NZ Jewellers$9,990 AUD

38 data points across 14 retailers

15 retailers$4,241 AUD to $9,990 AUD

A
Cheapest Retailer
-
$4,241 AUD
A
Retailer 2
-
$4,610 AUD
View
A
Retailer 3
-
$4,878 AUD
View
A
Retailer 4
-
$4,985 AUD
View
Retailer 5
-
$5,194 AUD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$5,194 AUD
View
B+
Retailer 7
-
$5,394 AUD
View
B+
Retailer 8
-
$5,737 AUD
View
B+
Retailer 9
-
$5,994 AUD
View
B+
Retailer 10
-
$6,024 AUD
View
B+
Retailer 11
-
$6,243 AUD
View
Retailer 12
-
$6,727 AUD
View
Price last confirmed 14 days ago
B+
Retailer 13
-
$6,998 AUD
View
B
Retailer 14
-
$9,587 AUD
View
Most Expensive
B
NZ Jewellers
18b521fa-8fb0-499f-b2fe-e453b0e89815 · Nov 5
$9,990 AUD
$6,993 USD
View
14 more retailers have this diamond
Prices start from $4,241 AUDSave up to $5,748 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
$4,241 AUD