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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2567103225

Certificate GIA 2567103225

Diamond specifications and retailer prices

From $5,715 AUD
HK$31,400 HKD
As of October 28, 2026
Save $6,873 AUD (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $13,585 AUD at NZ Jewellers · As of October 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2567103225. Listed at 11 retailers as of October 28, 2026, with a 120% 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2567103225
Dimensions7.24 × 7.30 × 4.56 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Needle
Top View
7.24 mm7.30 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2567103225
Side View
Table 57.0%CrownGirdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

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 28
Current: $13,585 AUD|Low: $5,715 AUD|High: $13,875 AUD|Avg: $8,653 AUD|-2.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 5$5,715 AUD
Retailer 6$6,577 AUD
Retailer 10$6,891 AUD
Retailer 9$7,341 AUD
Retailer 3$8,122 AUD
Retailer 11$8,122 AUD
Retailer 2$8,133 AUD
Retailer 8$8,298 AUD
Retailer 7$8,824 AUD
Retailer 4$12,588 AUD
NZ Jewellers$13,585 AUD

29 data points across 11 retailers

11 retailers$5,715 AUD to $12,588 AUD

A
Cheapest Retailer
-
$5,715 AUD
HK$31,400 HKD
A
Retailer 2
-
$6,577 AUD
€4,405 EUR
View
A
Retailer 3
-
$6,891 AUD
$4,846 USD
View
A
Retailer 4
-
$7,341 AUD
SGD 6,977 SGD
View
B+
Retailer 5
-
$8,122 AUD
$5,712 USD
View
Price last confirmed 15 days ago
B+
Retailer 6
-
$8,122 AUD
$5,712 USD
View
Price last confirmed 13 days ago
B+
Retailer 7
-
$8,133 AUD
£4,504 GBP
View
B+
Retailer 8
-
$8,298 AUD
$5,836 USD
View
B+
Retailer 9
-
$8,824 AUD
€5,910 EUR
View
B
Retailer 10
-
$12,588 AUD
£6,971 GBP
View
Most Expensive
B
NZ Jewellers
4999cb3f-c561-4b78-81e9-38bc7486ca1c · Oct 14
$13,585 AUD
$9,554 USD
View
Price last confirmed 15 days ago
10 more retailers have this diamond
Prices start from $5,715 AUDSave up to $6,873 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
$5,715 AUD