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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 $9,111 AUD
$6,400 USD
As of October 28, 2026
Save $7,846 AUD (46%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $20,350 AUD 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: $20,350 AUD|Low: $8,479 AUD|High: $20,350 AUD|Avg: $12,371 AUD
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$9,111 AUD
Retailer 7$10,174 AUD
Retailer 11$10,176 AUD
Retailer 3$10,260 AUD
Retailer 10$11,023 AUD
Retailer 8$11,192 AUD
Retailer 2$11,395 AUD
Retailer 5$12,549 AUD
Retailer 9$12,718 AUD
Retailer 4$16,957 AUD
NZ Jewellers$20,350 AUD

41 data points across 11 retailers

18 retailers$9,111 AUD to $16,957 AUD

B+
Cheapest Retailer
-
$9,111 AUD
$6,400 USD
B
Retailer 2
-
$9,441 AUD
$6,632 USD
View
B
Retailer 3
-
$9,527 AUD
$6,692 USD
View
B
Retailer 4
-
$10,049 AUD
CA$9,804 CAD
View
B
Retailer 5
-
$10,174 AUD
$7,147 USD
View
Final sale: no returns
B
Retailer 6
-
$10,176 AUD
$7,148 USD
View
B
Retailer 7
-
$10,260 AUD
$7,207 USD
View
B
Retailer 8
-
$11,023 AUD
$7,743 USD
View
B
Retailer 9
-
$11,192 AUD
$7,862 USD
View
B
Retailer 10
-
$11,395 AUD
£6,303 GBP
View
B
Retailer 11
-
$11,658 AUD
$8,189 USD
View
B
Retailer 12
-
$12,143 AUD
$8,530 USD
View
B
Retailer 13
-
$12,143 AUD
$8,530 USD
View
B
Retailer 14
-
$12,549 AUD
€8,395 EUR
View
B
Retailer 15
-
$12,556 AUD
$8,820 USD
View
B
Retailer 16
-
$12,718 AUD
$8,934 USD
View
B
Retailer 17
-
$16,957 AUD
£9,379 GBP
View
Most Expensive
NZ Jewellers
4cfe04df-6bbe-485e-9145-1404a02f04fc · Oct 30
$20,350 AUD
$14,295 USD
View
Price under review
17 more retailers have this diamond
Prices start from $9,111 AUDSave up to $7,846 AUD

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
$9,111 AUD