CaratHunter
Plans
Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

VG • J/SI1 • GIA 3555071739

Certificate GIA 3555071739

Diamond specifications and retailer prices

From $3,732 NZD
As of November 6, 2026
Save $4,609 NZD (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $9,884 NZD at NZ Jewellers · As of October 21, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 3555071739. Listed at 14 retailers as of November 4, 2026, with a 123% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
J
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555071739
Dimensions7.32 × 6.12 × 4.38 mm
L/W Ratio1.20
Culet sizeNone
Key to symbols
Twinning Wisp, Indented Natural
Top View
7.32 mm6.12 mm1.20 ctJ / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555071739
Side View
Table 57.0%CrownGirdle: Sli. ThickPavilionCulet: NoneDepth 59.9%

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: $9,884 NZD|Low: $4,127 NZD|High: $9,884 NZD|Avg: $5,958 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6$4,127 NZD
Retailer 8$4,282 NZD
Retailer 9$4,481 NZD
Retailer 2$4,631 NZD
Retailer 7$4,943 NZD
Retailer 4$5,825 NZD
Retailer 3$5,926 NZD
Retailer 5$8,341 NZD
NZ Jewellers$9,884 NZD

43 data points across 9 retailers

14 retailers$3,732 NZD to $8,341 NZD

B+
Cheapest Retailer
-
$3,732 NZD
B+
Retailer 2
-
$4,127 NZD
View
Retailer 3
-
$4,282 NZD
View
Price last confirmed 16 days ago
Retailer 4
-
$4,481 NZD
View
Price last confirmed 16 days ago
B
Retailer 5
-
$4,546 NZD
View
B+
Retailer 6
-
$4,631 NZD
View
Retailer 7
-
$4,943 NZD
View
Price last confirmed 15 days ago
B
Retailer 8
-
$4,979 NZD
View
B
Retailer 9
-
$4,979 NZD
View
B
Retailer 10
-
$5,141 NZD
View
B
Retailer 11
-
$5,825 NZD
View
B
Retailer 12
-
$5,926 NZD
View
B
Retailer 13
-
$8,341 NZD
View
Most Expensive
NZ Jewellers
df2d14e0-08df-4e8d-a5d8-0c24320e995a · Oct 21
$9,884 NZD
$5,479 USD
View
Price last confirmed 16 days ago
13 more retailers have this diamond
Prices start from $3,732 NZDSave up to $4,609 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.

B+
1.20ct Heart
$3,732 NZD