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Round|Natural|GIA

1.70ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 2558109024

Certificate GIA 2558109024

Diamond specifications and retailer prices

From $4,302 AUD
As of November 6, 2026
Save $2,583 AUD (38%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $9,932 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.7ct natural round diamond

This 1.7ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2558109024. Listed at 12 retailers as of November 5, 2026, with a 60% 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

1.70
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2558109024
Dimensions7.62 × 7.55 × 4.72 mm
L/W Ratio1.01
Top View
7.62 mm7.55 mm1.70 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2558109024
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: Very SmallDepth 62.3%

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 6
Current: $4,509 AUD|Low: $4,266 AUD|High: $6,935 AUD|Avg: $5,503 AUD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4$4,302 AUD
Retailer 1$4,509 AUD
Retailer 7$5,234 AUD
Retailer 5$5,392 AUD
Retailer 6$5,855 AUD
Retailer 3$6,335 AUD
Retailer 2$6,885 AUD

46 data points across 7 retailers

12 retailers$4,302 AUD to $6,885 AUD

A
Cheapest Retailer
-
$4,302 AUD
A
Retailer 2
-
$4,509 AUD
View
B+
Retailer 3
-
$5,234 AUD
View
B+
Retailer 4
-
$5,392 AUD
View
Retailer 5
-
$5,701 AUD
View
Price last confirmed 17 days ago
Retailer 6
-
$5,701 AUD
View
Price last confirmed 21 days ago
Retailer 7
-
$5,701 AUD
View
Price last confirmed 22 days ago
B
Retailer 8
-
$5,855 AUD
View
B
Retailer 9
-
$6,335 AUD
View
Retailer 10
-
$6,577 AUD
View
Price last confirmed 19 days ago
B
Retailer 11
-
$6,885 AUD
View
Most Expensive
NZ Jewellers
e669a4be-7710-40b6-97ff-06ad5b512486 · Oct 17
$9,932 AUD
$6,824 USD
View
Price last confirmed 20 days ago
11 more retailers have this diamond
Prices start from $4,302 AUDSave up to $2,583 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
1.70ct Round
$4,302 AUD