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Round|Natural|GIA

1.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 3475588059

Certificate GIA 3475588059

Diamond specifications and retailer prices

From $5,451 NZD
As of November 6, 2026
Save $1,681 NZD (24%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $10,698 NZD at NZ Jewellers · As of September 28, 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 3475588059. Listed at 10 retailers as of November 5, 2026, with a 31% 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
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 3475588059
Dimensions7.30 × 7.33 × 4.57 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
7.30 mm7.33 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3475588059
Side View
Table 59.0%Crown 34°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.5%

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 6
Current: $7,132 NZD|Low: $4,744 NZD|High: $7,306 NZD|Avg: $6,097 NZD|+2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 7$4,744 NZD
Retailer 2$5,451 NZD
Retailer 4$5,534 NZD
Retailer 3$6,141 NZD
Retailer 6$6,397 NZD
Retailer 1$7,132 NZD
Retailer 5$7,306 NZD

20 data points across 7 retailers

10 retailers$5,451 NZD to $7,132 NZD

B+
Cheapest Retailer
-
$5,451 NZD
B+
Retailer 2
-
$5,534 NZD
View
Retailer 3
-
$6,141 NZD
View
Price last confirmed 8 days ago
Retailer 4
-
$6,141 NZD
View
Price last confirmed 29 days ago
B
Retailer 5
-
$6,377 NZD
View
Retailer 6
-
$6,377 NZD
View
Price last confirmed 38 days ago
B
Retailer 7
-
$6,397 NZD
View
Retailer 8
-
$7,085 NZD
View
Price last confirmed 28 days ago
B
Retailer 9
-
$7,132 NZD
View
Most Expensive
NZ Jewellers
7cdb8c93-2266-431c-8539-1193759f87bd · Sep 28
$10,698 NZD
$6,014 USD
View
Price last confirmed 39 days ago
9 more retailers have this diamond
Prices start from $5,451 NZDSave up to $1,681 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
$5,451 NZD