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Heart|Natural|IGI

1.21ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 788607601

Shape and cutting style on the report: Heart brilliant

Certificate IGI 788607601

Diamond specifications and retailer prices

From $3,243 NZD
As of November 4, 2026
Save $5,513 NZD (63%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,756 NZD at NZ Jewellers · As of November 3, 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 very-good cut grade and certified by IGI 788607601. Listed at 15 retailers as of November 3, 2026, with prices from $3,243 to $8,756, a $5,513 spread on the same certified stone. NZ Jewellers lists it at $8,756. 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 788607601
Dimensions6.57 × 7.20 × 4.42 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizePointed
Top View
6.57 mm7.20 mm1.21 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 788607601
Side View
Table 62.0%Crown 37.3°Girdle: MED-THKPavilion 41.6°Culet: NoneDepth 61.4%

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 4
Current: $8,756 NZD|Low: $3,243 NZD|High: $8,756 NZD|Avg: $4,543 NZD|+13.2%
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 4, 2026
Retailer 3$3,243 NZD
Retailer 7$3,312 NZD
Retailer 13$3,501 NZD
Retailer 16$3,574 NZD
Retailer 10$3,590 NZD
Retailer 2$3,653 NZD
Retailer 8$3,700 NZD
Retailer 12$3,756 NZD
Retailer 4$3,768 NZD
Retailer 14$3,839 NZD
Retailer 11$3,972 NZD
Retailer 5$4,142 NZD
Retailer 6$4,411 NZD
Retailer 9$4,881 NZD
Retailer 15$6,288 NZD
NZ Jewellers$8,756 NZD

30 data points across 16 retailers

15 retailers$3,243 NZD to $8,756 NZD

A
Cheapest Retailer
-
$3,243 NZD
A
Retailer 2
-
$3,501 NZD
View
B+
Retailer 3
-
$3,574 NZD
View
A
Retailer 4
-
$3,590 NZD
View
B+
Retailer 5
-
$3,653 NZD
View
Retailer 6
-
$3,700 NZD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
$3,756 NZD
View
B+
Retailer 8
-
$3,768 NZD
View
B+
Retailer 9
-
$3,839 NZD
View
B+
Retailer 10
-
$3,972 NZD
View
B+
Retailer 11
-
$4,142 NZD
View
B+
Retailer 12
-
$4,411 NZD
View
B
Retailer 13
-
$4,881 NZD
View
B
Retailer 14
-
$6,288 NZD
View
Most Expensive
C
NZ Jewellers
e7f57f2b-408c-44ac-805d-a1c3ad3009ff · Nov 3
$8,756 NZD
$4,854 USD
View
14 more retailers have this diamond
Prices start from $3,243 NZDSave up to $5,513 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
$3,243 NZD