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Round|Natural|GIA

1.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2527748242

Certificate GIA 2527748242

Diamond specifications and retailer prices

From $10,176 AUD
As of November 5, 2026
Save $8,495 AUD (45%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $21,700 AUD at NZ Jewellers · As of September 28, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2527748242. Listed at 20 retailers as of November 4, 2026, with a 83% 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2527748242
Dimensions7.23 × 7.30 × 4.57 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Knot, Needle
Top View
7.23 mm7.30 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2527748242
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.8%

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: Nov 5
Current: $12,451 AUD|Low: $10,176 AUD|High: $18,923 AUD|Avg: $12,829 AUD
Retailer 1
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
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 2$10,176 AUD
Retailer 5$10,518 AUD
Retailer 14$10,672 AUD
Retailer 3$10,805 AUD
Retailer 17$11,199 AUD
Retailer 6$11,233 AUD
Retailer 4$11,969 AUD
Retailer 8$11,976 AUD
Retailer 10$12,252 AUD
Retailer 7$12,428 AUD
Retailer 9$12,444 AUD
Retailer 1$12,451 AUD
Retailer 16$12,649 AUD
Retailer 15$13,598 AUD
Retailer 12$14,353 AUD
Retailer 11$16,389 AUD
Retailer 13$18,671 AUD

31 data points across 17 retailers

20 retailers$10,176 AUD to $18,671 AUD

A
Cheapest Retailer
-
$10,176 AUD
B+
Retailer 2
-
$10,477 AUD
View
B+
Retailer 3
-
$10,518 AUD
View
B+
Retailer 4
-
$10,672 AUD
View
B+
Retailer 5
-
$10,805 AUD
View
B+
Retailer 6
-
$11,199 AUD
View
B+
Retailer 7
-
$11,233 AUD
View
Final sale: no returns
B+
Retailer 8
-
$11,969 AUD
View
B+
Retailer 9
-
$12,252 AUD
View
Retailer 10
-
$12,428 AUD
View
Price last confirmed 22 days ago
B+
Retailer 11
-
$12,451 AUD
View
Retailer 12
-
$12,649 AUD
View
Price last confirmed 15 days ago
Retailer 13
-
$12,973 AUD
View
Price last confirmed 29 days ago
Retailer 14
-
$13,174 AUD
View
Price last confirmed 38 days ago
B+
Retailer 15
-
$13,598 AUD
View
B+
Retailer 16
-
$14,353 AUD
View
Retailer 17
-
$14,970 AUD
View
Price last confirmed 38 days ago
B
Retailer 18
-
$16,389 AUD
View
B
Retailer 19
-
$18,671 AUD
View
Most Expensive
NZ Jewellers
be9c3285-1c73-4813-8bc1-fe060c57aea2 · Sep 28
$21,700 AUD
$14,910 USD
View
Price last confirmed 39 days ago
19 more retailers have this diamond
Prices start from $10,176 AUDSave up to $8,495 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
$10,176 AUD