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Heart|Natural|GIA

1.21ct D SI2 Heart Natural Diamond

EX • D/SI2 • GIA 1545265538

Certificate GIA 1545265538

Diamond specifications and retailer prices

From $3,446 AUD
As of November 6, 2026
Save $4,101 AUD (54%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,780 AUD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1545265538. Listed at 20 retailers as of November 4, 2026, with a 119% 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

1.21
Carat
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1545265538
Dimensions7.33 × 6.74 × 4.30 mm
L/W Ratio1.09
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle
Top View
7.33 mm6.74 mm1.21 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1545265538
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 58.6%

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: $8,780 AUD|Low: $3,427 AUD|High: $8,807 AUD|Avg: $5,059 AUD|+2.3%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9$3,446 AUD
Retailer 2$3,589 AUD
Retailer 7$4,062 AUD
Retailer 3$4,171 AUD
Retailer 11$4,177 AUD
Retailer 6$4,682 AUD
Retailer 10$4,734 AUD
Retailer 5$4,791 AUD
Retailer 4$5,270 AUD
Retailer 8$7,548 AUD
Queensmith$8,780 AUD

30 data points across 11 retailers

20 retailers$3,446 AUD to $7,548 AUD

A
Cheapest Retailer
-
$3,446 AUD
A
Retailer 2
-
$3,589 AUD
View
B+
Retailer 3
-
$4,062 AUD
View
B+
Retailer 4
-
$4,171 AUD
View
B+
Retailer 5
-
$4,177 AUD
View
Final sale: no returns
B+
Retailer 6
-
$4,276 AUD
View
Retailer 7
-
$4,551 AUD
View
Price last confirmed 19 days ago
Retailer 8
-
$4,551 AUD
View
Price last confirmed 21 days ago
Retailer 9
-
$4,576 AUD
View
Price last confirmed 45 days ago
B+
Retailer 10
-
$4,682 AUD
View
Retailer 11
-
$4,726 AUD
View
Price last confirmed 21 days ago
B+
Retailer 12
-
$4,734 AUD
View
B+
Retailer 13
-
$4,791 AUD
View
Retailer 14
-
$5,251 AUD
View
Price last confirmed 18 days ago
B+
Retailer 15
-
$5,270 AUD
View
Retailer 16
-
$5,280 AUD
View
Price last confirmed 45 days ago
B
Retailer 17
-
$7,548 AUD
View
Retailer 18
-
$7,929 AUD
View
Price last confirmed 19 days ago
Retailer 19
-
$7,973 AUD
View
Price last confirmed 47 days ago
Most Expensive
Queensmith
1545265538 · Oct 28
$8,780 AUD
£4,750 GBP
View
Price last confirmed 9 days ago
19 more retailers have this diamond
Prices start from $3,446 AUDSave up to $4,101 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 Heart
$3,446 AUD