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Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 2557187780

Certificate GIA 2557187780

Diamond specifications and retailer prices

From $6,836 NZD
HK$30,100 HKD
As of November 1, 2026
Save $9,001 NZD (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $15,837 NZD at NZ Jewellers · As of October 30, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557187780. Listed at 11 retailers as of October 30, 2026, with prices from $6,836 to $15,837, a $9,001 spread on the same certified stone. NZ Jewellers lists it at $15,837. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557187780
Dimensions8.84 × 6.32 × 4.10 mm
L/W Ratio1.40
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
8.84 mm6.32 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557187780
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 64.8%

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 1
Current: $15,837 NZD|Low: $6,836 NZD|High: $16,909 NZD|Avg: $10,275 NZD|-6.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 4$6,836 NZD
Retailer 6$7,811 NZD
Retailer 8$8,336 NZD
Retailer 9$8,628 NZD
Retailer 11$8,842 NZD
Retailer 3$8,887 NZD
Retailer 7$9,308 NZD
Retailer 10$9,469 NZD
Retailer 2$10,560 NZD
Retailer 5$15,082 NZD
NZ Jewellers$15,837 NZD

42 data points across 11 retailers

11 retailers$6,836 NZD to $15,837 NZD

A
Cheapest Retailer
-
$6,836 NZD
HK$30,100 HKD
A
Retailer 2
-
$7,811 NZD
€4,193 EUR
View
A
Retailer 3
-
$8,336 NZD
$4,698 USD
View
A
Retailer 4
-
$8,628 NZD
$4,863 USD
View
Retailer 5
-
$8,842 NZD
SGD 6,734 SGD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$8,887 NZD
$5,009 USD
View
Final sale: no returns
A
Retailer 7
-
$9,308 NZD
$5,246 USD
View
B+
Retailer 8
-
$9,469 NZD
$5,337 USD
View
B+
Retailer 9
-
$10,560 NZD
€5,668 EUR
View
B
Retailer 10
-
$15,082 NZD
£6,693 GBP
View
Most Expensive
B
NZ Jewellers
5b2d960c-fe95-4daa-a8f4-fc95cf67fffe · Oct 30
$15,837 NZD
$8,926 USD
View
10 more retailers have this diamond
Prices start from $6,836 NZDSave up to $9,001 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
$6,836 NZD