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Round|Natural|GIA

1.51ct G SI2 Round Natural Diamond

EX • G/SI2 • GIA 7521240383

Certificate GIA 7521240383

Diamond specifications and retailer prices

From $8,346 AUD
$5,870 USD
As of October 29, 2026
Save $8,572 AUD (51%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $17,836 AUD at NZ Jewellers · As of September 21, 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7521240383. Listed at 15 retailers as of October 27, 2026, with a 103% 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
G
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 7521240383
Dimensions7.30 × 7.26 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
7.30 mm7.26 mm1.51 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7521240383
Side View
Table 57.0%Crown 35.5°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.9%

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 29
Current: $16,918 AUD|Low: $8,346 AUD|High: $16,918 AUD|Avg: $10,975 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
Retailer 14
October 29, 2026
Retailer 3$8,346 AUD
Retailer 10$8,750 AUD
Retailer 6$9,015 AUD
Retailer 5$9,158 AUD
Retailer 7$9,423 AUD
Retailer 2$9,699 AUD
Retailer 12$9,760 AUD
Retailer 4$10,280 AUD
Retailer 9$10,280 AUD
Retailer 13$10,622 AUD
Retailer 11$10,993 AUD
Retailer 14$14,808 AUD
Retailer 8$14,983 AUD
NZ Jewellers$16,918 AUD

38 data points across 14 retailers

15 retailers$8,346 AUD to $16,918 AUD

A
Cheapest Retailer
-
$8,346 AUD
$5,870 USD
A
Retailer 2
-
$8,750 AUD
$6,154 USD
View
A
Retailer 3
-
$9,015 AUD
CA$8,806 CAD
View
A
Retailer 4
-
$9,158 AUD
SGD 8,704 SGD
View
A
Retailer 5
-
$9,423 AUD
$6,627 USD
View
A
Retailer 6
-
$9,699 AUD
£5,371 GBP
View
A
Retailer 7
-
$9,760 AUD
$6,864 USD
View
B+
Retailer 8
-
$10,280 AUD
$7,230 USD
View
B+
Retailer 9
-
$10,280 AUD
$7,230 USD
View
B+
Retailer 10
-
$10,622 AUD
$7,470 USD
View
B+
Retailer 11
-
$10,993 AUD
€7,363 EUR
View
B
Retailer 12
-
$14,808 AUD
$10,414 USD
View
B
Retailer 13
-
$14,983 AUD
£8,297 GBP
View
B
Retailer 14
-
$16,918 AUD
$11,898 USD
View
Most Expensive
B
NZ Jewellers
2da3d894-812d-4f15-93a8-77e8c8b89583 · Sep 21
$17,836 AUD
$12,544 USD
View
Price last confirmed 37 days ago
14 more retailers have this diamond
Prices start from $8,346 AUDSave up to $8,572 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
$8,346 AUD