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Heart|Natural|GIA

1.21ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 2508189179

Certificate GIA 2508189179

Diamond specifications and retailer prices

From $2,905 AUD
As of November 6, 2026
Save $5,238 AUD (64%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,143 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2508189179. Listed at 20 retailers as of November 5, 2026, with prices from $2,905 to $8,143, a $5,238 spread on the same certified stone. NZ Jewellers lists it at $8,143. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2508189179
Dimensions6.69 × 7.23 × 4.20 mm
L/W Ratio1.08
Top View
6.69 mm7.23 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2508189179
Side View
Table 56.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 58.1%

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: $8,143 AUD|Low: $2,869 AUD|High: $8,143 AUD|Avg: $4,451 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 7, 2026
Retailer 13$2,905 AUD
Retailer 14$3,438 AUD
Retailer 5$3,489 AUD
Retailer 15$3,595 AUD
Retailer 3$3,835 AUD
Retailer 6$3,844 AUD
Retailer 7$3,895 AUD
Retailer 11$4,033 AUD
Retailer 4$4,045 AUD
Retailer 9$4,109 AUD
Retailer 8$4,304 AUD
Retailer 16$4,363 AUD
Retailer 12$4,753 AUD
Retailer 10$4,836 AUD
Retailer 2$6,787 AUD
NZ Jewellers$8,143 AUD

44 data points across 16 retailers

20 retailers$2,905 AUD to $8,143 AUD

B+
Cheapest Retailer
-
$2,905 AUD
B+
Retailer 2
-
$3,438 AUD
View
B+
Retailer 3
-
$3,489 AUD
View
B
Retailer 4
-
$3,595 AUD
View
Final sale: no returns
B+
Retailer 5
-
$3,772 AUD
View
B+
Retailer 6
-
$3,835 AUD
View
Retailer 7
-
$3,895 AUD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$3,895 AUD
View
B
Retailer 9
-
$4,033 AUD
View
B
Retailer 10
-
$4,045 AUD
View
B
Retailer 11
-
$4,100 AUD
View
B+
Retailer 12
-
$4,109 AUD
View
B
Retailer 13
-
$4,304 AUD
View
Retailer 14
-
$4,363 AUD
View
Price last confirmed 31 days ago
B
Retailer 15
-
$4,459 AUD
View
B
Retailer 16
-
$4,494 AUD
View
B
Retailer 17
-
$4,753 AUD
View
B
Retailer 18
-
$4,836 AUD
View
B
Retailer 19
-
$6,787 AUD
View
Most Expensive
B
NZ Jewellers
f3b42846-f509-4876-a79d-a14152981848 · Nov 5
$8,143 AUD
$5,595 USD
View
19 more retailers have this diamond
Prices start from $2,905 AUDSave up to $5,238 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
$2,905 AUD