Oval|Natural|GIA

1.51ct E SI1 Oval Natural Diamond

EX • E/SI1 • GIA 1528318853

Certificate GIA 1528318853

Diamond specifications and retailer prices

From $10,990 NZD
₹589,890 INR
As of October 30, 2026
Save $7,727 NZD (41%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $21,135 NZD at NZ Jewellers · As of September 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1528318853. Listed at 14 retailers as of October 29, 2026, with a 70% 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36.8°
Pavilion angle34.6°
OriginNatural
Grading LabGIA
CertificateGIA 1528318853
Dimensions8.98 × 6.36 × 3.92 mm
L/W Ratio1.41
Girdle conditionFaceted
Cert comments
Clouds are not shown. Internal graining is not shown.
Key to symbols
Crystal, Feather
Top View
8.98 mm6.36 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1528318853
Side View
Table 60.0%Crown 36.8°Girdle: THK-VTKPavilion 34.6°Culet: NoneDepth 61.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $10,990 NZD|Low: $10,924 NZD|High: $18,843 NZD|Avg: $13,793 NZD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 1$10,990 NZD
Retailer 2$12,118 NZD
Retailer 6$12,265 NZD
Retailer 4$13,788 NZD
Retailer 5$15,388 NZD
Retailer 3$18,716 NZD

36 data points across 6 retailers

14 retailers$10,990 NZD to $18,716 NZD

Retailer 1
-
$10,931 NZD
$6,161 USD
Price last confirmed 58 days ago
A
Retailer 2
-
$10,990 NZD
₹589,890 INR
View
A
Retailer 3
-
$11,022 NZD
$6,212 USD
View
Retailer 4
-
$11,664 NZD
$6,574 USD
View
Price last confirmed 18 days ago
A
Retailer 5
-
$11,693 NZD
$6,590 USD
View
A
Retailer 6
-
$12,118 NZD
£5,378 GBP
View
Retailer 7
-
$12,265 NZD
A$10,635 AUD
View
Price last confirmed 8 days ago
Retailer 8
-
$12,637 NZD
$7,122 USD
View
Price last confirmed 23 days ago
Retailer 9
-
$12,832 NZD
$7,232 USD
View
Price last confirmed 31 days ago
B+
Retailer 10
-
$13,788 NZD
€7,401 EUR
View
Retailer 11
-
$14,581 NZD
$8,218 USD
View
Price last confirmed 21 days ago
B+
Retailer 12
-
$15,388 NZD
ZAR 140,110 ZAR
View
B+
Retailer 13
-
$18,716 NZD
£8,306 GBP
View
Most Expensive
NZ Jewellers
9eb5b6d1-a113-46a1-a957-1080dbec719d · Sep 30
$21,135 NZD
$11,912 USD
View
Price last confirmed 30 days ago
13 more retailers have this diamond
Prices start from $10,990 NZDSave up to $7,727 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
$10,990 NZD