Oval|Natural|GIA

1.51ct D SI2 Oval Natural Diamond

EX • D/SI2 • GIA 6525797508

Certificate GIA 6525797508

Diamond specifications and retailer prices

From $8,026 AUD
$5,638 USD
As of October 28, 2026
Save $5,897 AUD (42%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $15,722 AUD 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6525797508. Listed at 16 retailers as of October 28, 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.83°
Pavilion angle40.38°
OriginNatural
Grading LabGIA
CertificateGIA 6525797508
Dimensions8.88 × 6.35 × 4.11 mm
L/W Ratio1.40
Top View
8.88 mm6.35 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6525797508
Side View
Table 59.0%Crown 37.83°Girdle: STK-THKPavilion 40.38°Culet: NoneDepth 64.7%

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 28
Current: $9,017 AUD|Low: $7,954 AUD|High: $14,017 AUD|Avg: $9,377 AUD|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 8$8,026 AUD
Retailer 5$8,150 AUD
Retailer 6$8,199 AUD
Retailer 7$8,677 AUD
Retailer 9$8,677 AUD
Retailer 3$8,884 AUD
Retailer 1$9,017 AUD
Retailer 2$10,271 AUD
Retailer 4$13,923 AUD

42 data points across 9 retailers

16 retailers$8,026 AUD to $13,923 AUD

A
Cheapest Retailer
-
$8,026 AUD
$5,638 USD
A
Retailer 2
-
$8,150 AUD
$5,725 USD
View
A
Retailer 3
-
$8,199 AUD
$5,759 USD
View
A
Retailer 4
-
$8,677 AUD
$6,095 USD
View
Final sale: no returns
Retailer 5
-
$8,677 AUD
$6,095 USD
View
Price last confirmed 23 days ago
A
Retailer 6
-
$8,884 AUD
£4,914 GBP
View
A
Retailer 7
-
$9,017 AUD
£4,987 GBP
View
Retailer 8
-
$9,400 AUD
$6,603 USD
View
Price last confirmed 39 days ago
Retailer 9
-
$9,400 AUD
$6,603 USD
View
Price last confirmed 23 days ago
Retailer 10
-
$9,545 AUD
$6,705 USD
View
Price last confirmed 32 days ago
A
Retailer 11
-
$10,271 AUD
€6,871 EUR
View
Retailer 12
-
$10,846 AUD
$7,619 USD
View
Price last confirmed 39 days ago
Retailer 13
-
$10,846 AUD
$7,619 USD
View
Price last confirmed 22 days ago
B+
Retailer 14
-
$13,923 AUD
£7,701 GBP
View
Retailer 15
-
$15,722 AUD
$11,044 USD
View
Price last confirmed 36 days ago
Most Expensive
NZ Jewellers
c6a2ddb8-3355-498d-8c6d-da67c61f5cfe · Sep 30
$15,722 AUD
$11,044 USD
View
Price last confirmed 31 days ago
15 more retailers have this diamond
Prices start from $8,026 AUDSave up to $5,897 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.

A
1.51ct Oval
$8,026 AUD