Heart|Natural|GIA

1.51ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 6511530906

Certificate GIA 6511530906

Diamond specifications and retailer prices

From $5,310 USD
£4,181 GBP
As of October 29, 2026
Save $4,808 USD (48%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $10,118 USD at NZ Jewellers · As of October 27, 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 27, 2026, with prices from $5,310 to $10,118, a $4,808 spread on the same certified stone. NZ Jewellers lists it at $10,118. 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
Color
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: Oct 29
Current: $10,118 USD|Low: $5,310 USD|High: $10,118 USD|Avg: $6,783 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 2$5,310 USD
Retailer 6$5,568 USD
Retailer 8$5,765 USD
Retailer 3$5,917 USD
Retailer 4$5,917 USD
Retailer 9$5,981 USD
Retailer 5$6,023 USD
Retailer 7$8,764 USD
NZ Jewellers$10,118 USD

45 data points across 9 retailers

9 retailers$5,310 USD to $10,118 USD

A
Cheapest Retailer
-
$5,310 USD
£4,181 GBP
A
Retailer 2
-
$5,568 USD
£4,385 GBP
View
B+
Retailer 3
-
$5,765 USD
View
A
Retailer 4
-
$5,917 USD
View
A
Retailer 5
-
$5,917 USD
View
A
Retailer 6
-
$5,981 USD
A$9,201 AUD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
$6,023 USD
View
B+
Retailer 8
-
$8,764 USD
£6,901 GBP
View
Most Expensive
B
NZ Jewellers
8134b5e0-c12e-4565-9ea7-62757ff29826 · Oct 27
$10,118 USD
View
8 more retailers have this diamond
Prices start from $5,310 USDSave up to $4,808 USD

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
$5,310 USD