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Oval|Natural|GIA

1.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 7518688839

Certificate GIA 7518688839

Diamond specifications and retailer prices

From $14,404 NZD
₹773,153 INR
As of October 31, 2026
Save $10,478 NZD (42%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $26,412 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 D 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 7518688839. Listed at 21 retailers as of October 29, 2026, with a 73% 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7518688839
Dimensions9.69 × 6.38 × 3.91 mm
L/W Ratio1.52
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
9.69 mm6.38 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7518688839
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 61.4%

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: Oct 31
Current: $26,412 NZD|Low: $14,404 NZD|High: $26,412 NZD|Avg: $19,405 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
November 1, 2026
Retailer 7$14,404 NZD
Retailer 3$15,988 NZD
Retailer 2$17,332 NZD
Retailer 11$17,491 NZD
Retailer 5$17,493 NZD
Retailer 12$17,582 NZD
Retailer 13$19,242 NZD
Retailer 10$19,245 NZD
Retailer 8$19,968 NZD
Retailer 4$20,998 NZD
Retailer 6$23,281 NZD
Retailer 9$24,882 NZD
NZ Jewellers$26,412 NZD

33 data points across 13 retailers

21 retailers$14,404 NZD to $24,882 NZD

A
Cheapest Retailer
-
$14,404 NZD
₹773,153 INR
B+
Retailer 2
-
$15,988 NZD
$9,011 USD
View
B+
Retailer 3
-
$16,231 NZD
$9,148 USD
View
B+
Retailer 4
-
$16,535 NZD
$9,319 USD
View
B+
Retailer 5
-
$17,308 NZD
$9,755 USD
View
B+
Retailer 6
-
$17,332 NZD
£7,692 GBP
View
B+
Retailer 7
-
$17,491 NZD
$9,858 USD
View
Final sale: no returns
Retailer 8
-
$17,493 NZD
$9,859 USD
View
Price last confirmed 20 days ago
Retailer 9
-
$17,582 NZD
A$15,245 AUD
View
Price last confirmed 28 days ago
B+
Retailer 10
-
$18,919 NZD
$10,663 USD
View
Retailer 11
-
$18,950 NZD
$10,680 USD
View
Price last confirmed 40 days ago
Retailer 12
-
$18,950 NZD
$10,680 USD
View
Price last confirmed 24 days ago
B+
Retailer 13
-
$19,245 NZD
$10,847 USD
View
B+
Retailer 14
-
$19,388 NZD
$10,927 USD
View
B+
Retailer 15
-
$19,968 NZD
€10,718 EUR
View
B
Retailer 16
-
$20,998 NZD
$11,835 USD
View
Retailer 17
-
$21,865 NZD
$12,323 USD
View
Price last confirmed 23 days ago
Retailer 18
-
$21,865 NZD
$12,323 USD
View
Price last confirmed 40 days ago
B
Retailer 19
-
$23,281 NZD
ZAR 211,975 ZAR
View
B
Retailer 20
-
$24,882 NZD
£11,042 GBP
View
Most Expensive
NZ Jewellers
2bec4626-2b35-41e2-a961-5fa7ade75aac · Sep 30
$26,412 NZD
$14,886 USD
View
Price last confirmed 32 days ago
20 more retailers have this diamond
Prices start from $14,404 NZDSave up to $10,478 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
$14,404 NZD