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Heart|Natural|GIA

1.21ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 5241078543

Certificate GIA 5241078543

Diamond specifications and retailer prices

From $3,417 NZD
As of November 6, 2026
Save $4,479 NZD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $9,528 NZD at NZ Jewellers · As of October 18, 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 I 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 5241078543. Listed at 16 retailers as of November 6, 2026, with a 131% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5241078543
Dimensions6.53 × 7.44 × 4.31 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.53 mm7.44 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241078543
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 57.9%

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: $7,896 NZD|Low: $3,393 NZD|High: $8,080 NZD|Avg: $4,827 NZD|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 11$3,417 NZD
Retailer 8$3,994 NZD
Retailer 10$4,181 NZD
Retailer 3$4,248 NZD
Retailer 5$4,396 NZD
Retailer 6$4,735 NZD
Retailer 4$4,780 NZD
Retailer 9$4,784 NZD
Retailer 2$5,105 NZD
Retailer 7$5,531 NZD
Retailer 1$7,896 NZD

44 data points across 11 retailers

16 retailers$3,417 NZD to $7,896 NZD

A
Cheapest Retailer
-
$3,417 NZD
B+
Retailer 2
-
$3,994 NZD
View
B+
Retailer 3
-
$4,181 NZD
View
Final sale: no returns
B+
Retailer 4
-
$4,248 NZD
View
B+
Retailer 5
-
$4,396 NZD
View
Retailer 6
-
$4,558 NZD
View
Price last confirmed 20 days ago
Retailer 7
-
$4,558 NZD
View
Price last confirmed 22 days ago
B+
Retailer 8
-
$4,735 NZD
View
Retailer 9
-
$4,768 NZD
View
Price last confirmed 22 days ago
B+
Retailer 10
-
$4,780 NZD
View
B+
Retailer 11
-
$4,784 NZD
View
Retailer 12
-
$5,105 NZD
View
Price last confirmed 31 days ago
Retailer 13
-
$5,258 NZD
View
Price last confirmed 19 days ago
B+
Retailer 14
-
$5,531 NZD
View
B
Retailer 15
-
$7,896 NZD
View
Most Expensive
NZ Jewellers
b8ff14db-c968-4b36-b67a-db21493df5da · Oct 18
$9,528 NZD
$5,282 USD
View
Price last confirmed 20 days ago
15 more retailers have this diamond
Prices start from $3,417 NZDSave up to $4,479 NZD

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
$3,417 NZD