Heart|Natural|GIA

1.51ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 6511530906

Certificate GIA 6511530906

Diamond specifications and retailer prices

From $9,451 NZD
£4,194 GBP
As of November 1, 2026
Save $8,107 NZD (46%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $17,558 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6511530906. Listed at 9 retailers as of October 30, 2026, with prices from $9,451 to $17,558, a $8,107 spread on the same certified stone. NZ Jewellers lists it at $17,558. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.52°
Pavilion angle41.99°
OriginNatural
Grading LabGIA
CertificateGIA 6511530906
Dimensions6.98 × 8.02 × 4.83 mm
L/W Ratio1.15
Top View
6.98 mm8.02 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6511530906
Side View
Table 61.0%Crown 36.52°Girdle: Slightly Thick to ThickPavilion 41.99°Culet: NDepth 60.2%

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 1
Current: $17,558 NZD|Low: $9,422 NZD|High: $17,952 NZD|Avg: $12,048 NZD|-2.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 4$9,451 NZD
Retailer 2$9,823 NZD
Retailer 8$10,229 NZD
Retailer 5$10,499 NZD
Retailer 6$10,499 NZD
Retailer 9$10,611 NZD
Retailer 7$10,687 NZD
Retailer 3$15,467 NZD
NZ Jewellers$17,558 NZD

45 data points across 9 retailers

9 retailers$9,451 NZD to $17,558 NZD

A
Cheapest Retailer
-
$9,451 NZD
£4,194 GBP
A
Retailer 2
-
$9,823 NZD
£4,359 GBP
View
B+
Retailer 3
-
$10,229 NZD
$5,765 USD
View
A
Retailer 4
-
$10,499 NZD
$5,917 USD
View
A
Retailer 5
-
$10,499 NZD
$5,917 USD
View
Retailer 6
-
$10,611 NZD
A$9,201 AUD
View
Price last confirmed 22 days ago
B+
Retailer 7
-
$10,687 NZD
$6,023 USD
View
B+
Retailer 8
-
$15,467 NZD
£6,864 GBP
View
Most Expensive
B
NZ Jewellers
8134b5e0-c12e-4565-9ea7-62757ff29826 · Oct 30
$17,558 NZD
$9,896 USD
View
8 more retailers have this diamond
Prices start from $9,451 NZDSave up to $8,107 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
$9,451 NZD