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Heart|Natural|GIA

1.21ct D SI1 Heart Natural Diamond

GD • D/SI1 • GIA 2203906541

Certificate GIA 2203906541

Diamond specifications and retailer prices

From $5,216 AUD
As of November 6, 2026
Save $5,547 AUD (52%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $10,763 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2203906541. Listed at 20 retailers as of November 4, 2026, with prices from $5,216 to $10,763, a $5,547 spread on the same certified stone. MOH London lists it at $10,763. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
D
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2203906541
Dimensions6.42 × 5.69 × 3.79 mm
L/W Ratio1.13
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.42 mm5.69 mm1.21 ctD / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2203906541
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 66.6%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $10,763 AUD|Low: $4,455 AUD|High: $10,922 AUD|Avg: $6,800 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3$5,216 AUD
Retailer 8$5,346 AUD
Retailer 7$5,401 AUD
Retailer 9$5,666 AUD
Retailer 11$6,139 AUD
Retailer 5$6,631 AUD
Retailer 10$6,830 AUD
Retailer 4$7,207 AUD
Retailer 2$7,385 AUD
Retailer 6$8,267 AUD
MOH London$10,763 AUD

45 data points across 11 retailers

20 retailers$5,216 AUD to $10,763 AUD

B+
Cheapest Retailer
-
$5,216 AUD
B+
Retailer 2
-
$5,293 AUD
View
B+
Retailer 3
-
$5,346 AUD
View
B
Retailer 4
-
$5,401 AUD
View
B
Retailer 5
-
$5,413 AUD
View
B
Retailer 6
-
$5,666 AUD
View
Final sale: no returns
B
Retailer 7
-
$5,836 AUD
View
B
Retailer 8
-
$6,111 AUD
View
Retailer 9
-
$6,139 AUD
View
Price last confirmed 9 days ago
B
Retailer 10
-
$6,238 AUD
View
Retailer 11
-
$6,265 AUD
View
Price last confirmed 15 days ago
B
Retailer 12
-
$6,519 AUD
View
B
Retailer 13
-
$6,631 AUD
View
Retailer 14
-
$6,830 AUD
View
Price last confirmed 29 days ago
B
Retailer 15
-
$7,067 AUD
View
B
Retailer 16
-
$7,207 AUD
View
B
Retailer 17
-
$7,385 AUD
View
B
Retailer 18
-
$8,267 AUD
View
C
Retailer 19
-
$9,801 AUD
View
Most Expensive
B
MOH London
134D3AFB4 · Nov 4
$10,763 AUD
£5,823 GBP
View
19 more retailers have this diamond
Prices start from $5,216 AUDSave up to $5,547 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+
1.21ct Heart
$5,216 AUD