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Oval|Natural|GIA

1.51ct M SI1 Oval Natural Diamond

M/SI1 • GIA 1528973820

Certificate GIA 1528973820

Diamond specifications and retailer prices

From $4,104 NZD
As of November 6, 2026
Save $1,297 NZD (24%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $10,706 NZD at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included) and certified by GIA 1528973820. Listed at 8 retailers as of November 2, 2026, with a 32% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
M
Colour
SI1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1528973820
Dimensions9.99 × 5.66 × 3.36 mm
L/W Ratio1.77
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Etch Channel, Indented Natural
Top View
9.99 mm5.66 mm1.51 ctM / SI1
OriginNatural
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1528973820
Side View
Table 66.0%CrownGirdle: ThickPavilionCulet: NoneDepth 59.4%

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: $4,313 NZD|Low: $4,104 NZD|High: $8,531 NZD|Avg: $5,575 NZD|-16.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$4,104 NZD
Retailer 4$4,311 NZD
Retailer 1$4,313 NZD
Retailer 6$5,121 NZD
Retailer 7$5,121 NZD
Retailer 2$5,282 NZD
Retailer 3$5,401 NZD
Retailer 8$8,531 NZD

40 data points across 8 retailers

8 retailers$4,104 NZD to $5,401 NZD

B+
Cheapest Retailer
-
$4,104 NZD
B+
Retailer 2
-
$4,311 NZD
View
B+
Retailer 3
-
$4,313 NZD
View
Retailer 4
-
$5,121 NZD
View
Price last confirmed 45 days ago
B
Retailer 5
-
$5,282 NZD
View
B
Retailer 6
-
$5,401 NZD
View
Retailer 7
-
$5,908 NZD
View
Price last confirmed 45 days ago
Most Expensive
NZ Jewellers
deb5d89c-9723-4411-8732-4d1b642d771a · Sep 19
$10,706 NZD
$5,935 USD
View
Price last confirmed 47 days ago
7 more retailers have this diamond
Prices start from $4,104 NZDSave up to $1,297 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 Oval
$4,104 NZD