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Round|Natural|GIA

1.65ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 1518220126

Certificate GIA 1518220126

Diamond specifications and retailer prices

From $3,274 AUD
As of November 5, 2026
Save $1,452 AUD (31%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $4,726 AUD at Yorxs · As of November 6, 2026
View at Yorxs

About this 1.65ct natural round diamond

This 1.65ct 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 1518220126. Listed at 3 retailers as of November 5, 2026, with prices from $3,274 to $4,726, a $1,452 spread on the same certified stone. Yorxs lists it at $4,726. 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

1.65
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1518220126
Dimensions7.51 × 7.57 × 4.68 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Girdle conditionFaceted
Culet sizeNone
Cert comments
Pinpoints are not shown.
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
7.51 mm7.57 mm1.65 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1518220126
Side View
Table 60.0%Crown 34°Girdle: STK-STKPavilion 41.6°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $3,274 AUD|Low: $3,274 AUD|High: $4,752 AUD|Avg: $3,984 AUD|-1.4%
Retailer 1
Retailer 2
Yorxs
November 6, 2026
Retailer 1$3,274 AUD
Retailer 2$3,944 AUD
Yorxs$4,726 AUD

45 data points across 3 retailers

3 retailers$3,274 AUD to $4,726 AUD

A
Cheapest Retailer
-
$3,274 AUD
B+
Retailer 2
-
$3,944 AUD
View
Most Expensive
B+
Yorxs
OM1448 · Nov 6
$4,726 AUD
€3,151 EUR
View
2 more retailers have this diamond
Prices start from $3,274 AUDSave up to $1,452 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
1.65ct Round
$3,274 AUD