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Oval|Natural|GIA

1.51ct J SI2 Oval Natural Diamond

EX • J/SI2 • GIA 6422921460

Certificate GIA 6422921460

Diamond specifications and retailer prices

From $11,356 NZD
$6,400 USD
As of October 28, 2026
Save $9,779 NZD (46%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $25,364 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6422921460. Listed at 18 retailers as of October 28, 2026, with a 86% 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
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle45.52°
Pavilion angle37.98°
OriginNatural
Grading LabGIA
CertificateGIA 6422921460
Dimensions8.79 × 6.33 × 3.95 mm
L/W Ratio1.39
Top View
8.79 mm6.33 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6422921460
Side View
Table 57.0%Crown 45.52°Girdle: THN-STKPavilion 37.98°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $25,364 NZD|Low: $10,568 NZD|High: $25,364 NZD|Avg: $15,419 NZD
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 6$11,356 NZD
Retailer 7$12,681 NZD
Retailer 11$12,683 NZD
Retailer 3$12,787 NZD
Retailer 10$13,738 NZD
Retailer 8$13,950 NZD
Retailer 4$14,203 NZD
Retailer 2$15,690 NZD
Retailer 9$15,852 NZD
Retailer 5$21,134 NZD
NZ Jewellers$25,364 NZD

41 data points across 11 retailers

18 retailers$11,356 NZD to $21,134 NZD

B+
Cheapest Retailer
-
$11,356 NZD
$6,400 USD
B
Retailer 2
-
$11,767 NZD
$6,632 USD
View
B
Retailer 3
-
$11,874 NZD
$6,692 USD
View
B
Retailer 4
-
$12,525 NZD
CA$9,804 CAD
View
B
Retailer 5
-
$12,681 NZD
$7,147 USD
View
Final sale: no returns
B
Retailer 6
-
$12,683 NZD
$7,148 USD
View
B
Retailer 7
-
$12,787 NZD
$7,207 USD
View
B
Retailer 8
-
$13,738 NZD
$7,743 USD
View
B
Retailer 9
-
$13,950 NZD
$7,862 USD
View
B
Retailer 10
-
$14,203 NZD
£6,303 GBP
View
B
Retailer 11
-
$14,530 NZD
$8,189 USD
View
B
Retailer 12
-
$15,135 NZD
$8,530 USD
View
B
Retailer 13
-
$15,135 NZD
$8,530 USD
View
B
Retailer 14
-
$15,649 NZD
$8,820 USD
View
B
Retailer 15
-
$15,690 NZD
€8,422 EUR
View
B
Retailer 16
-
$15,852 NZD
$8,934 USD
View
B
Retailer 17
-
$21,134 NZD
£9,379 GBP
View
Most Expensive
NZ Jewellers
4cfe04df-6bbe-485e-9145-1404a02f04fc · Oct 30
$25,364 NZD
$14,295 USD
View
Price under review
17 more retailers have this diamond
Prices start from $11,356 NZDSave up to $9,779 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.

B+
1.51ct Oval
$11,356 NZD