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Heart|Natural|IGI

1.51ct G SI1 Heart Natural Diamond

VG • G/SI1 • IGI 801639168

Shape and cutting style on the report: Heart brilliant

Certificate IGI 801639168

Diamond specifications and retailer prices

From $4,879 AUD
$3,419 USD
As of November 1, 2026
Save $4,696 AUD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $9,574 AUD 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 801639168. Listed at 15 retailers as of October 30, 2026, with prices from $4,879 to $9,574, a $4,696 spread on the same certified stone. NZ Jewellers lists it at $9,574. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41.3°
OriginNatural
Grading LabIGI
CertificateIGI 801639168
Dimensions7.04 × 7.68 × 4.70 mm
L/W Ratio1.09
Girdle conditionFaceted
Top View
7.04 mm7.68 mm1.51 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 801639168
Side View
Table 61.0%Crown 36.5°Girdle: STK-THKPavilion 41.3°Culet: NoneDepth 61.2%

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: $9,574 AUD|Low: $4,879 AUD|High: $9,574 AUD|Avg: $5,936 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 5$4,879 AUD
Retailer 12$4,880 AUD
Retailer 6$4,971 AUD
Retailer 4$5,071 AUD
Retailer 2$5,178 AUD
Retailer 3$5,495 AUD
Retailer 13$5,495 AUD
Retailer 7$5,704 AUD
Retailer 15$5,706 AUD
Retailer 9$5,726 AUD
Retailer 14$6,341 AUD
Retailer 8$6,433 AUD
Retailer 11$6,755 AUD
Retailer 10$9,191 AUD
NZ Jewellers$9,574 AUD

14 data points across 15 retailers

15 retailers$4,879 AUD to $9,574 AUD

A
Cheapest Retailer
-
$4,879 AUD
$3,419 USD
A
Retailer 2
-
$4,880 AUD
$3,420 USD
View
A
Retailer 3
-
$4,971 AUD
$3,484 USD
View
A
Retailer 4
-
$5,071 AUD
$3,554 USD
View
Final sale: no returns
A
Retailer 5
-
$5,178 AUD
£2,857 GBP
View
A
Retailer 6
-
$5,495 AUD
$3,851 USD
View
A
Retailer 7
-
$5,495 AUD
$3,851 USD
View
B+
Retailer 8
-
$5,704 AUD
$3,998 USD
View
B+
Retailer 9
-
$5,706 AUD
$3,999 USD
View
A
Retailer 10
-
$5,726 AUD
£3,160 GBP
View
B+
Retailer 11
-
$6,341 AUD
$4,444 USD
View
B+
Retailer 12
-
$6,433 AUD
€4,294 EUR
View
B+
Retailer 13
-
$6,755 AUD
ZAR 76,479 ZAR
View
B
Retailer 14
-
$9,191 AUD
£5,072 GBP
View
Most Expensive
B
NZ Jewellers
486ccb40-1214-460a-8f96-964fb2254931 · Oct 30
$9,574 AUD
$6,710 USD
View
14 more retailers have this diamond
Prices start from $4,879 AUDSave up to $4,696 AUD

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
$4,879 AUD