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Heart|Natural|GIA

1.20ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 3535557448

Certificate GIA 3535557448

Diamond specifications and retailer prices

From $3,088 NZD
As of November 5, 2026
Save $613 NZD (17%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $3,702 NZD at Blue Nile · As of November 5, 2026
View at Blue Nile

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 3535557448. Listed at 4 retailers as of November 5, 2026, with prices from $3,088 to $3,702, a $613 spread on the same certified stone. Blue Nile lists it at $3,702. 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 3535557448
Dimensions6.57 × 7.35 × 4.33 mm
L/W Ratio1.12
Top View
6.57 mm7.35 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3535557448
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.8%

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 5
Current: $3,702 NZD|Low: $3,088 NZD|High: $4,605 NZD|Avg: $3,811 NZD|-19.6%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 7, 2026
Retailer 3$3,088 NZD
Retailer 2$3,328 NZD
Retailer 4$3,519 NZD
Blue Nile$3,702 NZD
Retailer 5$4,328 NZD

40 data points across 5 retailers

4 retailers$3,088 NZD to $3,702 NZD

A
Cheapest Retailer
-
$3,088 NZD
A
Retailer 2
-
$3,328 NZD
View
A
Retailer 3
-
$3,519 NZD
View
Most Expensive
B+
Blue Nile
26742561 · Nov 5
$3,702 NZD
$2,052 USD
View
3 more retailers have this diamond
Prices start from $3,088 NZDSave up to $613 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
$3,088 NZD