CaratHunter
Plans
Heart|Natural|GIA

1.20ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 6542470645

Certificate GIA 6542470645

Diamond specifications and retailer prices

From $3,265 NZD
As of November 5, 2026
6 retailers carry this diamond
Most expensive: $7,335 NZD at NZ Jewellers · As of September 25, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542470645. Listed at 6 retailers as of November 5, 2026. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle40.5°
OriginNatural
Grading LabGIA
CertificateGIA 6542470645
Dimensions6.46 × 7.29 × 4.29 mm
L/W Ratio1.13
Top View
6.46 mm7.29 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6542470645
Side View
Table 60.0%CrownGirdle: STK-VTKPavilion 40.5°Culet: NoneDepth 58.8%

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: $3,265 NZD|Low: $2,078 NZD|High: $5,275 NZD|Avg: $3,301 NZD|+1.2%
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
November 5, 2026
Retailer 6$2,078 NZD
Retailer 4$2,509 NZD
Retailer 2$2,682 NZD
Retailer 7$2,771 NZD
Retailer 11$2,917 NZD
Retailer 9$3,067 NZD
Retailer 13$3,112 NZD
Retailer 3$3,157 NZD
Retailer 1$3,265 NZD
Retailer 10$3,574 NZD
Retailer 5$3,925 NZD
Retailer 12$4,371 NZD
Retailer 8$5,190 NZD

13 data points across 13 retailers

6 retailers

Retailer 1
-
$2,078 NZD
Price last confirmed 35 days ago
Retailer 2
-
$2,917 NZD
View
Price last confirmed 34 days ago
Retailer 3
-
$3,157 NZD
View
Price last confirmed 34 days ago
B+
Retailer 4
-
$3,265 NZD
View
Retailer 5
-
$5,190 NZD
View
Price last confirmed 36 days ago
Most Expensive
NZ Jewellers
80c6ff25-0563-45b2-9f7b-35fb56c6ce28 · Sep 25
$7,335 NZD
$4,066 USD
View
Price last confirmed 42 days ago
5 more retailers have this diamond
Prices start from $3,265 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
$3,265 NZD