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Oval|Natural|GIA

1.51ct K SI1 Oval Natural Diamond

EX • K/SI1 • GIA 7538124930

Certificate GIA 7538124930

Diamond specifications and retailer prices

From $4,118 NZD
As of November 5, 2026
Save $5,406 NZD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $11,031 NZD at NZ Jewellers · As of October 17, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7538124930. Listed at 15 retailers as of November 2, 2026, with a 131% 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 7538124930
Dimensions8.88 × 6.46 × 4.06 mm
L/W Ratio1.37
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
8.88 mm6.46 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 7538124930
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 62.7%

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 5
Current: $11,031 NZD|Low: $4,017 NZD|High: $11,031 NZD|Avg: $6,103 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 9$4,118 NZD
Retailer 12$4,387 NZD
Retailer 2$4,643 NZD
Retailer 4$5,276 NZD
Retailer 6$5,276 NZD
Retailer 3$5,480 NZD
Retailer 13$5,529 NZD
Retailer 7$5,857 NZD
Retailer 5$6,088 NZD
Retailer 14$6,094 NZD
Retailer 10$6,664 NZD
Retailer 8$6,950 NZD
Retailer 11$9,525 NZD
NZ Jewellers$11,031 NZD

32 data points across 14 retailers

15 retailers$4,118 NZD to $9,525 NZD

A
Cheapest Retailer
-
$4,118 NZD
A
Retailer 2
-
$4,387 NZD
View
A
Retailer 3
-
$4,643 NZD
View
A
Retailer 4
-
$5,058 NZD
View
Retailer 5
-
$5,276 NZD
View
Price last confirmed 19 days ago
Retailer 6
-
$5,276 NZD
View
Price last confirmed 21 days ago
Retailer 7
-
$5,480 NZD
View
Price last confirmed 21 days ago
B+
Retailer 8
-
$5,529 NZD
View
B+
Retailer 9
-
$5,857 NZD
View
Retailer 10
-
$6,088 NZD
View
Price last confirmed 19 days ago
B+
Retailer 11
-
$6,094 NZD
View
B+
Retailer 12
-
$6,664 NZD
View
B+
Retailer 13
-
$6,950 NZD
View
B
Retailer 14
-
$9,525 NZD
View
Most Expensive
NZ Jewellers
19334150-a7b4-4654-a5a9-02760a4528ad · Oct 17
$11,031 NZD
$6,115 USD
View
Price last confirmed 20 days ago
14 more retailers have this diamond
Prices start from $4,118 NZDSave up to $5,406 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 Oval
$4,118 NZD