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1.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 2428630036

Certificate GIA 2428630036

Diamond specifications and retailer prices

From $5,799 NZD
As of November 5, 2026
Save $7,007 NZD (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $12,806 NZD 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 M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2428630036. Listed at 11 retailers as of November 5, 2026, with prices from $5,799 to $12,806, a $7,007 spread on the same certified stone. NZ Jewellers lists it at $12,806. 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
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2428630036
Dimensions7.29 × 7.32 × 4.58 mm
L/W Ratio1.00
Top View
7.29 mm7.32 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2428630036
Side View
Table 57.0%Crown 36.5°Girdle: THN-STKPavilion 41°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 5
Current: $12,806 NZD|Low: $5,799 NZD|High: $12,806 NZD|Avg: $7,685 NZD
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 14$5,799 NZD
Retailer 3$5,956 NZD
Retailer 5$6,379 NZD
Retailer 12$6,468 NZD
Retailer 6$7,334 NZD
Retailer 8$7,350 NZD
Retailer 9$7,350 NZD
Retailer 10$7,350 NZD
Retailer 13$7,612 NZD
Retailer 7$8,251 NZD
Retailer 11$8,482 NZD
Retailer 4$8,745 NZD
Retailer 2$9,469 NZD
NZ Jewellers$12,806 NZD

34 data points across 14 retailers

11 retailers$5,799 NZD to $12,806 NZD

B+
Cheapest Retailer
-
$5,799 NZD
B
Retailer 2
-
$6,379 NZD
View
B
Retailer 3
-
$6,468 NZD
View
B
Retailer 4
-
$7,350 NZD
View
Retailer 5
-
$7,350 NZD
View
Price last confirmed 8 days ago
B
Retailer 6
-
$7,350 NZD
View
B
Retailer 7
-
$7,612 NZD
View
B
Retailer 8
-
$8,251 NZD
View
B
Retailer 9
-
$8,482 NZD
View
B
Retailer 10
-
$9,469 NZD
View
Most Expensive
C
NZ Jewellers
78ce4ef3-6b18-4628-9613-46d7894a51ad · Nov 5
$12,806 NZD
$7,199 USD
View
10 more retailers have this diamond
Prices start from $5,799 NZDSave up to $7,007 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.

B+
1.51ct Round
$5,799 NZD