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Round|Natural|GIA

1.63ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 2457544624

Certificate GIA 2457544624

Diamond specifications and retailer prices

From $5,100 AUD
As of November 5, 2026
Save $1,393 AUD (21%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $9,268 AUD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.63ct natural round diamond

This 1.63ct 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 2457544624. Listed at 8 retailers as of November 5, 2026, with a 27% 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

1.63
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2457544624
Dimensions7.50 × 7.55 × 4.67 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.50 mm7.55 mm1.63 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2457544624
Side View
Table 57.0%Crown 34°Girdle: THN-STKPavilion 41.2°Culet: NoneDepth 62.1%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: $6,493 AUD|Low: $4,207 AUD|High: $6,538 AUD|Avg: $5,476 AUD|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 5, 2026
Retailer 4$4,207 AUD
Retailer 3$5,100 AUD
Retailer 2$6,188 AUD
Retailer 1$6,493 AUD

23 data points across 4 retailers

8 retailers$5,100 AUD to $6,493 AUD

B+
Cheapest Retailer
-
$5,100 AUD
Retailer 2
-
$5,320 AUD
View
Price last confirmed 29 days ago
Retailer 3
-
$5,320 AUD
View
Price last confirmed 29 days ago
Retailer 4
-
$5,524 AUD
View
Price last confirmed 38 days ago
Retailer 5
-
$6,138 AUD
View
Price last confirmed 38 days ago
B+
Retailer 6
-
$6,188 AUD
View
B
Retailer 7
-
$6,493 AUD
View
Most Expensive
NZ Jewellers
438007af-a70e-4b95-bc1a-6ab68c81071d · Sep 28
$9,268 AUD
$6,488 USD
View
Price last confirmed 39 days ago
7 more retailers have this diamond
Prices start from $5,100 AUDSave up to $1,393 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+
1.63ct Round
$5,100 AUD