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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 $11,557 AUD
₹773,153 INR
As of October 31, 2026
Save $8,407 AUD (42%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $21,192 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 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: $21,192 AUD|Low: $11,557 AUD|High: $21,192 AUD|Avg: $15,564 AUD
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
October 31, 2026
Retailer 6$11,557 AUD
Retailer 3$12,828 AUD
Retailer 7$13,907 AUD
Retailer 11$14,034 AUD
Retailer 5$14,035 AUD
Retailer 12$14,107 AUD
Retailer 13$15,439 AUD
Retailer 10$15,441 AUD
Retailer 8$16,021 AUD
Retailer 4$16,848 AUD
Retailer 2$18,679 AUD
Retailer 9$19,964 AUD
NZ Jewellers$21,192 AUD

32 data points across 13 retailers

21 retailers$11,557 AUD to $19,964 AUD

A
Cheapest Retailer
-
$11,557 AUD
₹773,153 INR
B+
Retailer 2
-
$12,828 AUD
$9,011 USD
View
B+
Retailer 3
-
$13,023 AUD
$9,148 USD
View
B+
Retailer 4
-
$13,267 AUD
$9,319 USD
View
B+
Retailer 5
-
$13,887 AUD
$9,755 USD
View
B+
Retailer 6
-
$13,907 AUD
£7,692 GBP
View
B+
Retailer 7
-
$14,034 AUD
$9,858 USD
View
Final sale: no returns
Retailer 8
-
$14,035 AUD
$9,859 USD
View
Price last confirmed 19 days ago
Retailer 9
-
$14,107 AUD
View
Price last confirmed 27 days ago
B+
Retailer 10
-
$15,180 AUD
$10,663 USD
View
Retailer 11
-
$15,204 AUD
$10,680 USD
View
Price last confirmed 39 days ago
Retailer 12
-
$15,204 AUD
$10,680 USD
View
Price last confirmed 24 days ago
B+
Retailer 13
-
$15,441 AUD
$10,847 USD
View
B+
Retailer 14
-
$15,556 AUD
$10,927 USD
View
B+
Retailer 15
-
$16,021 AUD
€10,718 EUR
View
B
Retailer 16
-
$16,848 AUD
$11,835 USD
View
Retailer 17
-
$17,543 AUD
$12,323 USD
View
Price last confirmed 22 days ago
Retailer 18
-
$17,543 AUD
$12,323 USD
View
Price last confirmed 39 days ago
Retailer 19
-
$18,679 AUD
ZAR 211,975 ZAR
View
B
Retailer 20
-
$19,964 AUD
£11,042 GBP
View
Most Expensive
NZ Jewellers
2bec4626-2b35-41e2-a961-5fa7ade75aac · Sep 30
$21,192 AUD
$14,886 USD
View
Price last confirmed 31 days ago
20 more retailers have this diamond
Prices start from $11,557 AUDSave up to $8,407 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
$11,557 AUD