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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1533904580

Certificate GIA 1533904580

Diamond specifications and retailer prices

From $7,070 AUD
HK$38,800 HKD
As of November 1, 2026
Save $6,967 AUD (50%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $15,934 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1533904580. Listed at 21 retailers as of November 1, 2026, with a 99% 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1533904580
Dimensions7.28 × 7.24 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
Clouds are not shown. Pinpoints are not shown.
Key to symbols
Crystal, Feather, Needle, Indented Natural, Natural
Top View
7.28 mm7.24 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1533904580
Side View
Table 57.0%Crown 36°Girdle: STK-STKPavilion 40.6°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 1
Current: $10,557 AUD|Low: $7,070 AUD|High: $14,205 AUD|Avg: $10,351 AUD|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6$7,070 AUD
Retailer 9$8,294 AUD
Retailer 8$8,792 AUD
Retailer 2$9,002 AUD
Retailer 7$9,298 AUD
Retailer 4$10,363 AUD
Retailer 1$10,557 AUD
Retailer 5$11,706 AUD
Retailer 3$14,037 AUD

40 data points across 9 retailers

21 retailers$7,070 AUD to $14,037 AUD

A
Cheapest Retailer
-
$7,070 AUD
HK$38,800 HKD
Retailer 2
-
$8,067 AUD
SGD 7,658 SGD
View
Price last confirmed 19 days ago
B+
Retailer 3
-
$8,294 AUD
$5,826 USD
View
B+
Retailer 4
-
$8,308 AUD
$5,836 USD
View
Retailer 5
-
$8,639 AUD
$6,068 USD
View
Price last confirmed 105 days ago
B+
Retailer 6
-
$8,792 AUD
$6,176 USD
View
Final sale: no returns
Retailer 7
-
$8,795 AUD
$6,178 USD
View
Price last confirmed 25 days ago
B+
Retailer 8
-
$8,841 AUD
$6,210 USD
View
B+
Retailer 9
-
$9,002 AUD
£4,979 GBP
View
Retailer 10
-
$9,298 AUD
View
Price last confirmed 20 days ago
B+
Retailer 11
-
$9,469 AUD
$6,652 USD
View
Retailer 12
-
$9,527 AUD
$6,692 USD
View
Price last confirmed 25 days ago
Retailer 13
-
$9,673 AUD
$6,795 USD
View
Price last confirmed 33 days ago
B+
Retailer 14
-
$9,754 AUD
$6,852 USD
View
B
Retailer 15
-
$10,363 AUD
€6,933 EUR
View
B+
Retailer 16
-
$10,557 AUD
£5,839 GBP
View
Retailer 17
-
$10,993 AUD
$7,722 USD
View
Price last confirmed 56 days ago
Retailer 18
-
$10,993 AUD
$7,722 USD
View
Price last confirmed 24 days ago
B+
Retailer 19
-
$11,706 AUD
ZAR 132,836 ZAR
View
B
Retailer 20
-
$14,037 AUD
£7,764 GBP
View
Most Expensive
NZ Jewellers
2e3019be-6bad-462a-ae34-2634988fc2a2 · Sep 28
$15,934 AUD
$11,193 USD
View
Price last confirmed 35 days ago
20 more retailers have this diamond
Prices start from $7,070 AUDSave up to $6,967 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
$7,070 AUD