Round|Natural|GIA

1.51ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 1525339860

Certificate GIA 1525339860

Diamond specifications and retailer prices

From $9,431 AUD
$6,625 USD
As of October 30, 2026
Save $11,417 AUD (55%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $20,849 AUD at NZ Jewellers · As of September 14, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round 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 and certified by GIA 1525339860. Listed at 28 retailers as of October 30, 2026, with a 121% 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1525339860
Dimensions7.34 × 7.38 × 4.55 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Top View
7.34 mm7.38 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1525339860
Side View
Table 58.0%Crown 33.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.9%

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 30
Current: $20,849 AUD|Low: $8,241 AUD|High: $20,849 AUD|Avg: $12,429 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
November 1, 2026
Retailer 4$9,760 AUD
Retailer 8$9,889 AUD
Retailer 9$10,424 AUD
Retailer 12$10,425 AUD
Retailer 13$11,293 AUD
Retailer 10$11,467 AUD
Retailer 5$11,481 AUD
Retailer 2$11,538 AUD
Retailer 11$12,602 AUD
Retailer 6$12,957 AUD
Retailer 3$13,030 AUD
Retailer 7$17,465 AUD
NZ Jewellers$20,849 AUD

41 data points across 13 retailers

28 retailers$9,431 AUD to $20,849 AUD

A
Cheapest Retailer
-
$9,431 AUD
$6,625 USD
Retailer 2
-
$9,710 AUD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$9,760 AUD
$6,856 USD
View
A
Retailer 4
-
$9,889 AUD
$6,947 USD
View
A
Retailer 5
-
$10,014 AUD
$7,034 USD
View
A
Retailer 6
-
$10,424 AUD
$7,322 USD
View
Final sale: no returns
A
Retailer 7
-
$10,425 AUD
$7,323 USD
View
A
Retailer 8
-
$11,105 AUD
$7,800 USD
View
Retailer 9
-
$11,293 AUD
$7,933 USD
View
Price last confirmed 54 days ago
Retailer 10
-
$11,293 AUD
$7,933 USD
View
Price last confirmed 48 days ago
A
Retailer 11
-
$11,293 AUD
$7,933 USD
View
B+
Retailer 12
-
$11,467 AUD
$8,055 USD
View
Retailer 13
-
$11,481 AUD
$8,065 USD
View
Price last confirmed 9 days ago
A
Retailer 14
-
$11,538 AUD
£6,382 GBP
View
B+
Retailer 15
-
$11,538 AUD
$8,105 USD
View
B+
Retailer 16
-
$11,666 AUD
$8,195 USD
View
B+
Retailer 17
-
$12,214 AUD
$8,580 USD
View
B+
Retailer 18
-
$12,214 AUD
$8,580 USD
View
B+
Retailer 19
-
$12,602 AUD
$8,852 USD
View
B+
Retailer 20
-
$12,613 AUD
$8,860 USD
View
B+
Retailer 21
-
$12,957 AUD
€8,668 EUR
View
Retailer 22
-
$13,030 AUD
$9,153 USD
View
Price last confirmed 55 days ago
Retailer 23
-
$13,030 AUD
$9,153 USD
View
Price last confirmed 47 days ago
B+
Retailer 24
-
$13,030 AUD
$9,153 USD
View
B+
Retailer 25
-
$17,465 AUD
£9,660 GBP
View
Retailer 26
-
$20,849 AUD
$14,645 USD
View
Price last confirmed 60 days ago
B
Retailer 27
-
$20,849 AUD
$14,645 USD
View
Most Expensive
NZ Jewellers
56c3b2a2-e2db-4670-8242-ef152f7bc2de · Sep 14
$20,849 AUD
$14,645 USD
View
Price last confirmed 48 days ago
27 more retailers have this diamond
Prices start from $9,431 AUDSave up to $11,417 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 Round
$9,431 AUD