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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 $1,100 USD
As of November 6, 2026
Save $2,535 USD (70%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,635 USD 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 $1,100 to $3,635, a $2,535 spread on the same certified stone. NZ Jewellers lists it at $3,635. 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
Color
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: $1,465 USD|Low: $1,100 USD|High: $2,073 USD|Avg: $1,517 USD|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8$1,100 USD
Retailer 2$1,114 USD
Retailer 6$1,382 USD
Retailer 1$1,465 USD
Retailer 7$1,559 USD
Retailer 5$1,585 USD
Retailer 3$1,818 USD
Retailer 4$2,060 USD

42 data points across 8 retailers

12 retailers$1,100 USD to $3,635 USD

A
Cheapest Retailer
-
$1,100 USD
A
Retailer 2
-
$1,114 USD
View
B+
Retailer 3
-
$1,382 USD
View
A
Retailer 4
-
$1,465 USD
View
B+
Retailer 5
-
$1,490 USD
View
Retailer 6
-
$1,490 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$1,559 USD
View
B+
Retailer 8
-
$1,585 USD
View
B+
Retailer 9
-
$1,719 USD
View
B+
Retailer 10
-
$1,818 USD
View
B+
Retailer 11
-
$2,060 USD
View
Most Expensive
C
NZ Jewellers
b749ebb2-c399-4b76-b0fb-19c871a8799a · Nov 5
$3,635 USD
View
11 more retailers have this diamond
Prices start from $1,100 USDSave up to $2,535 USD

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
$1,100 USD