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Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5496366542

Certificate GIA 5496366542

Diamond specifications and retailer prices

From $6,345 NZD
As of November 4, 2026
Save $7,213 NZD (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $14,603 NZD at NZ Jewellers · As of October 20, 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 5496366542. Listed at 16 retailers as of November 4, 2026, with a 114% 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 angle34°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 5496366542
Dimensions7.36 × 7.39 × 4.48 mm
L/W Ratio1.00
Star length45%
Lower girdle75%
Top View
7.36 mm7.39 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5496366542
Side View
Table 59.0%Crown 34°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 60.7%

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 4
Current: $9,295 NZD|Low: $6,345 NZD|High: $13,594 NZD|Avg: $9,336 NZD|-0.5%
Retailer 1
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 14$6,345 NZD
Retailer 12$6,804 NZD
Retailer 4$7,338 NZD
Retailer 2$7,733 NZD
Retailer 3$7,733 NZD
Retailer 7$8,350 NZD
Retailer 5$8,779 NZD
Retailer 6$8,923 NZD
Retailer 1$9,295 NZD
Retailer 13$9,425 NZD
Retailer 9$9,466 NZD
Retailer 10$9,595 NZD
Retailer 8$10,414 NZD
Retailer 11$13,559 NZD

36 data points across 14 retailers

16 retailers$6,345 NZD to $13,559 NZD

A
Cheapest Retailer
-
$6,345 NZD
A
Retailer 2
-
$6,804 NZD
View
B+
Retailer 3
-
$7,338 NZD
View
Retailer 4
-
$7,592 NZD
View
Price last confirmed 21 days ago
Retailer 5
-
$7,733 NZD
View
Price last confirmed 15 days ago
Retailer 6
-
$7,733 NZD
View
Price last confirmed 15 days ago
B+
Retailer 7
-
$8,350 NZD
View
B+
Retailer 8
-
$8,779 NZD
View
Retailer 9
-
$8,923 NZD
View
Price last confirmed 16 days ago
B+
Retailer 10
-
$9,295 NZD
View
Retailer 11
-
$9,425 NZD
View
Price last confirmed 14 days ago
B
Retailer 12
-
$9,466 NZD
View
B
Retailer 13
-
$9,595 NZD
View
B
Retailer 14
-
$10,414 NZD
View
B
Retailer 15
-
$13,559 NZD
View
Most Expensive
NZ Jewellers
9eac41b1-20e5-4cf4-ae86-a3e1d9d3065b · Oct 20
$14,603 NZD
$8,209 USD
View
Price last confirmed 16 days ago
15 more retailers have this diamond
Prices start from $6,345 NZDSave up to $7,213 NZD

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
$6,345 NZD