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Oval|Natural|GIA

1.50ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 2557796851

Certificate GIA 2557796851

Diamond specifications and retailer prices

From $6,268 NZD
HK$27,600 HKD
As of November 1, 2026
Save $8,890 NZD (59%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $15,158 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.5ct natural oval diamond

This 1.5ct 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 2557796851. Listed at 10 retailers as of October 30, 2026, with prices from $6,268 to $15,158, a $8,890 spread on the same certified stone. NZ Jewellers lists it at $15,158. 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

1.50
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.73°
OriginNatural
Grading LabGIA
CertificateGIA 2557796851
Dimensions8.80 × 6.25 × 4.03 mm
L/W Ratio1.41
Key to symbols
Crystal, Feather, Needle
Top View
8.80 mm6.25 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557796851
Side View
Table 56.0%CrownGirdle: STK-THKPavilion 35.73°Culet: NoneDepth 64.4%

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: $15,158 NZD|Low: $6,268 NZD|High: $15,885 NZD|Avg: $9,826 NZD|-4.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2$6,268 NZD
Retailer 3$7,225 NZD
Retailer 5$7,667 NZD
Retailer 9$8,121 NZD
Retailer 4$8,541 NZD
Retailer 8$8,701 NZD
Retailer 10$9,259 NZD
Retailer 6$9,881 NZD
Retailer 7$13,933 NZD
NZ Jewellers$15,158 NZD

40 data points across 10 retailers

10 retailers$6,268 NZD to $15,158 NZD

A
Cheapest Retailer
-
$6,268 NZD
HK$27,600 HKD
A
Retailer 2
-
$7,225 NZD
€3,878 EUR
View
A
Retailer 3
-
$7,667 NZD
$4,321 USD
View
A
Retailer 4
-
$8,121 NZD
SGD 6,185 SGD
View
A
Retailer 5
-
$8,541 NZD
$4,814 USD
View
A
Retailer 6
-
$8,701 NZD
$4,904 USD
View
B+
Retailer 7
-
$9,259 NZD
A$8,028 AUD
View
B+
Retailer 8
-
$9,881 NZD
€5,304 EUR
View
B+
Retailer 9
-
$13,933 NZD
£6,183 GBP
View
Most Expensive
B
NZ Jewellers
565532c0-953b-4f2d-aed4-fc30a2b45f0d · Oct 30
$15,158 NZD
$8,543 USD
View
9 more retailers have this diamond
Prices start from $6,268 NZDSave up to $8,890 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
1.50ct Oval
$6,268 NZD