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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 2427009307

Certificate GIA 2427009307

Diamond specifications and retailer prices

From $6,480 NZD
As of October 31, 2026
Save $10,695 NZD (62%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $17,175 NZD at Adiamor · As of November 5, 2026
View at Adiamor

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2427009307. Listed at 15 retailers as of October 31, 2026, with prices from $6,480 to $17,175, a $10,695 spread on the same certified stone. Adiamor lists it at $17,175. 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

1.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2427009307
Dimensions6.57 × 8.10 × 4.46 mm
L/W Ratio1.23
Top View
6.57 mm8.10 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2427009307
Side View
Table 62.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 55.1%

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: Oct 31
Current: $15,407 NZD|Low: $6,180 NZD|High: $15,407 NZD|Avg: $8,706 NZD|+118.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$6,480 NZD
Retailer 6$6,487 NZD
Retailer 4$7,551 NZD
Retailer 7$8,247 NZD
Retailer 2$8,798 NZD
Retailer 8$8,937 NZD
Retailer 3$14,193 NZD
Retailer 1$15,407 NZD

42 data points across 8 retailers

15 retailers$6,480 NZD to $17,175 NZD

A
Cheapest Retailer
-
$6,480 NZD
A
Retailer 2
-
$6,487 NZD
View
A
Retailer 3
-
$7,551 NZD
View
B+
Retailer 4
-
$7,630 NZD
View
B+
Retailer 5
-
$8,247 NZD
View
Final sale: no returns
B+
Retailer 6
-
$8,798 NZD
View
B+
Retailer 7
-
$8,937 NZD
View
B+
Retailer 8
-
$8,937 NZD
View
Retailer 9
-
$8,937 NZD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$9,209 NZD
View
B
Retailer 11
-
$10,311 NZD
View
B
Retailer 12
-
$14,193 NZD
View
B
Retailer 13
-
$15,407 NZD
View
B
Retailer 14
-
$15,568 NZD
View
Most Expensive
B
Adiamor
D-64680553 · Nov 5
$17,175 NZD
$9,521 USD
View
14 more retailers have this diamond
Prices start from $6,480 NZDSave up to $10,695 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
1.51ct Heart
$6,480 NZD