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Round|Natural|GIA

1.21ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 1537184144

Certificate GIA 1537184144

Diamond specifications and retailer prices

From $1,571 AUD
As of November 6, 2026
Save $3,621 AUD (70%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,193 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1537184144. Listed at 12 retailers as of November 5, 2026, with prices from $1,571 to $5,193, a $3,621 spread on the same certified stone. NZ Jewellers lists it at $5,193. 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

1.21
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1537184144
Dimensions6.75 × 6.79 × 4.22 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
6.75 mm6.79 mm1.21 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1537184144
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.4%

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: $1,586 AUD|Low: $1,571 AUD|High: $2,961 AUD|Avg: $2,162 AUD|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8$1,571 AUD
Retailer 1$1,586 AUD
Retailer 6$1,974 AUD
Retailer 2$2,093 AUD
Retailer 7$2,227 AUD
Retailer 5$2,264 AUD
Retailer 3$2,597 AUD
Retailer 4$2,943 AUD

41 data points across 8 retailers

12 retailers$1,571 AUD to $5,193 AUD

A
Cheapest Retailer
-
$1,571 AUD
A
Retailer 2
-
$1,586 AUD
View
B+
Retailer 3
-
$1,974 AUD
View
A
Retailer 4
-
$2,093 AUD
View
B+
Retailer 5
-
$2,128 AUD
View
Retailer 6
-
$2,128 AUD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$2,227 AUD
View
B+
Retailer 8
-
$2,264 AUD
View
B+
Retailer 9
-
$2,456 AUD
View
B+
Retailer 10
-
$2,597 AUD
View
B+
Retailer 11
-
$2,943 AUD
View
Most Expensive
C
NZ Jewellers
b749ebb2-c399-4b76-b0fb-19c871a8799a · Nov 5
$5,193 AUD
$3,635 USD
View
11 more retailers have this diamond
Prices start from $1,571 AUDSave up to $3,621 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
1.21ct Round
$1,571 AUD