CaratHunter
Plans
Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1533428742

Certificate GIA 1533428742

Diamond specifications and retailer prices

From $9,559 AUD
As of November 7, 2026
Save $9,908 AUD (51%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $19,467 AUD at NZ Jewellers · As of November 7, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1533428742. Listed at 23 retailers as of November 7, 2026, with prices from $9,559 to $19,467, a $9,908 spread on the same certified stone. NZ Jewellers lists it at $19,467. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1533428742
Dimensions7.34 × 7.27 × 4.59 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Indented Natural, Natural
Top View
7.34 mm7.27 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1533428742
Side View
Table 57.0%Crown 36°Girdle: THN-STKPavilion 41.2°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 7
Current: $19,467 AUD|Low: $8,111 AUD|High: $19,467 AUD|Avg: $11,724 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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 7, 2026
Retailer 9$9,559 AUD
Retailer 19$9,734 AUD
Retailer 7$9,769 AUD
Retailer 11$9,769 AUD
Retailer 3$10,079 AUD
Retailer 17$10,079 AUD
Retailer 2$10,300 AUD
Retailer 6$10,854 AUD
Retailer 16$10,901 AUD
Retailer 4$11,243 AUD
Retailer 13$11,425 AUD
Retailer 10$11,760 AUD
Retailer 18$11,760 AUD
Retailer 8$11,854 AUD
Retailer 15$12,070 AUD
Retailer 5$12,153 AUD
Retailer 12$14,518 AUD
Retailer 14$16,133 AUD
NZ Jewellers$19,467 AUD

42 data points across 19 retailers

23 retailers$9,559 AUD to $19,467 AUD

Retailer 1
-
$7,984 AUD
Price last confirmed 59 days ago
B+
Retailer 2
-
$9,559 AUD
View
Retailer 3
-
$9,591 AUD
View
Price last confirmed 51 days ago
B+
Retailer 4
-
$9,734 AUD
View
Final sale: no returns
B+
Retailer 5
-
$9,769 AUD
View
B+
Retailer 6
-
$10,079 AUD
View
B+
Retailer 7
-
$10,079 AUD
View
B+
Retailer 8
-
$10,300 AUD
View
B
Retailer 9
-
$10,854 AUD
View
B+
Retailer 10
-
$10,901 AUD
View
Retailer 11
-
$11,067 AUD
View
Price last confirmed 46 days ago
B+
Retailer 12
-
$11,243 AUD
View
B+
Retailer 13
-
$11,425 AUD
View
Retailer 14
-
$11,666 AUD
View
Price last confirmed 48 days ago
B
Retailer 15
-
$11,760 AUD
View
B
Retailer 16
-
$11,760 AUD
View
B
Retailer 17
-
$11,854 AUD
View
B+
Retailer 18
-
$12,070 AUD
View
B
Retailer 19
-
$12,153 AUD
View
B
Retailer 20
-
$14,518 AUD
View
B
Retailer 21
-
$16,133 AUD
View
Retailer 22
-
$17,708 AUD
View
Price last confirmed 47 days ago
Most Expensive
B
NZ Jewellers
e2dd3cb1-c754-4aa5-a1eb-a753c9f95080 · Nov 7
$19,467 AUD
$13,376 USD
View
22 more retailers have this diamond
Prices start from $9,559 AUDSave up to $9,908 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.

B+
1.51ct Round
$9,559 AUD