Heart|Natural|GIA

1.20ct H SI1 Heart Natural Diamond

ID • H/SI1 • GIA 3545938134

Certificate GIA 3545938134

Diamond specifications and retailer prices

From $3,831 NZD
As of November 6, 2026
Save $4,928 NZD (56%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $10,569 NZD at NZ Jewellers · As of October 18, 2026
View at NZ Jewellers

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded H 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 3545938134. Listed at 22 retailers as of November 6, 2026, with a 129% 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

1.20
Carat
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3545938134
Dimensions6.60 × 7.51 × 4.44 mm
L/W Ratio1.14
Top View
6.60 mm7.51 mm1.20 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3545938134
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 59.1%

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: $10,569 NZD|Low: $3,831 NZD|High: $10,569 NZD|Avg: $6,163 NZD
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 3$3,831 NZD
Retailer 10$3,988 NZD
Retailer 14$4,506 NZD
Retailer 5$4,640 NZD
Retailer 15$4,735 NZD
Retailer 11$4,876 NZD
Retailer 8$5,055 NZD
Retailer 4$5,282 NZD
Retailer 12$5,314 NZD
Retailer 9$5,320 NZD
Retailer 16$5,466 NZD
Retailer 7$5,834 NZD
Retailer 13$6,135 NZD
Retailer 2$8,760 NZD
Retailer 6$10,399 NZD
NZ Jewellers$10,569 NZD

24 data points across 16 retailers

22 retailers$3,831 NZD to $8,760 NZD

A
Cheapest Retailer
-
$3,831 NZD
A
Retailer 2
-
$3,988 NZD
View
B+
Retailer 3
-
$4,506 NZD
View
B+
Retailer 4
-
$4,640 NZD
View
Final sale: no returns
B+
Retailer 5
-
$4,735 NZD
View
B+
Retailer 6
-
$4,786 NZD
View
B+
Retailer 7
-
$4,789 NZD
View
B+
Retailer 8
-
$4,876 NZD
View
Retailer 9
-
$5,055 NZD
View
Price last confirmed 20 days ago
Retailer 10
-
$5,107 NZD
View
Price last confirmed 22 days ago
B+
Retailer 11
-
$5,282 NZD
View
Retailer 12
-
$5,303 NZD
View
Price last confirmed 22 days ago
B+
Retailer 13
-
$5,314 NZD
View
B+
Retailer 14
-
$5,320 NZD
View
B+
Retailer 15
-
$5,426 NZD
View
B+
Retailer 16
-
$5,466 NZD
View
Retailer 17
-
$5,753 NZD
View
Price last confirmed 31 days ago
Retailer 18
-
$5,834 NZD
View
Price last confirmed 19 days ago
B+
Retailer 19
-
$6,135 NZD
View
B
Retailer 20
-
$8,760 NZD
View
Retailer 21
-
$10,399 NZD
View
Price last confirmed 10 days ago
Most Expensive
NZ Jewellers
dd034e2e-e7de-4487-a812-4eff1fbf8c7e · Oct 18
$10,569 NZD
$5,859 USD
View
Price last confirmed 20 days ago
21 more retailers have this diamond
Prices start from $3,831 NZDSave up to $4,928 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
1.20ct Heart
$3,831 NZD