Heart|Natural|GIA

1.20ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 1443376340

Certificate GIA 1443376340

Diamond specifications and retailer prices

From $4,825 NZD
As of November 5, 2026
Save $3,738 NZD (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $10,246 NZD at NZ Jewellers · As of September 30, 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 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 1443376340. Listed at 14 retailers as of November 4, 2026, with a 77% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1443376340
Dimensions6.42 × 7.55 × 4.36 mm
L/W Ratio1.18
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Natural
Top View
6.42 mm7.55 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1443376340
Side View
Table 57.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 57.8%

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 5
Current: $8,563 NZD|Low: $4,135 NZD|High: $8,689 NZD|Avg: $5,391 NZD|-1.3%
Retailer 1
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
November 4, 2026
Retailer 4$4,135 NZD
Retailer 2$4,389 NZD
Retailer 12$4,825 NZD
Retailer 15$4,901 NZD
Retailer 14$5,156 NZD
Retailer 8$5,186 NZD
Retailer 7$5,210 NZD
Retailer 3$5,267 NZD
Retailer 6$5,267 NZD
Retailer 5$5,448 NZD
Retailer 11$5,489 NZD
Retailer 13$5,729 NZD
Retailer 9$5,938 NZD
Retailer 10$5,947 NZD
Retailer 1$8,563 NZD

30 data points across 15 retailers

14 retailers$4,825 NZD to $8,563 NZD

Retailer 1
-
$4,389 NZD
Price last confirmed 18 days ago
B+
Retailer 2
-
$4,825 NZD
View
Retailer 3
-
$4,901 NZD
View
Price last confirmed 30 days ago
Retailer 4
-
$5,089 NZD
View
Price last confirmed 37 days ago
B
Retailer 5
-
$5,156 NZD
View
B+
Retailer 6
-
$5,186 NZD
View
B
Retailer 7
-
$5,210 NZD
View
Retailer 8
-
$5,489 NZD
View
Price last confirmed 31 days ago
Retailer 9
-
$5,655 NZD
View
Price last confirmed 29 days ago
B
Retailer 10
-
$5,729 NZD
View
B
Retailer 11
-
$5,938 NZD
View
Retailer 12
-
$5,947 NZD
View
Price last confirmed 21 days ago
B
Retailer 13
-
$8,563 NZD
View
Most Expensive
NZ Jewellers
bbd29a78-304e-44f7-8eb2-e3776e7f2961 · Sep 30
$10,246 NZD
$5,680 USD
View
Price last confirmed 37 days ago
13 more retailers have this diamond
Prices start from $4,825 NZDSave up to $3,738 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
$4,825 NZD