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Heart|Natural|IGI

0.90ct K SI1 Heart Natural Diamond

VG • K/SI1 • IGI 818638390

Shape and cutting style on the report: Heart brilliant

Certificate IGI 818638390

Diamond specifications and retailer prices

From $1,135 AUD
As of November 6, 2026
Save $3,244 AUD (74%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,379 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.9ct natural heart diamond

This 0.9ct natural heart sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 818638390. Listed at 12 retailers as of November 5, 2026, with prices from $1,135 to $4,379, a $3,244 spread on the same certified stone. NZ Jewellers lists it at $4,379. 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

0.90
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 818638390
Dimensions5.86 × 6.43 × 4.10 mm
L/W Ratio1.10
Girdle conditionFaceted
Top View
5.86 mm6.43 mm0.90 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 818638390
Side View
Table 57.0%Crown 39.7°Girdle: STK-THKPavilion 40.5°Culet: NoneDepth 63.8%

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 6
Current: $4,379 AUD|Low: $1,135 AUD|High: $4,379 AUD|Avg: $1,917 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 2$1,135 AUD
Retailer 6$1,396 AUD
Retailer 10$1,397 AUD
Retailer 8$1,450 AUD
Retailer 5$1,611 AUD
Retailer 4$1,998 AUD
Retailer 7$2,045 AUD
Retailer 9$2,554 AUD
Retailer 3$2,672 AUD
NZ Jewellers$4,379 AUD

39 data points across 10 retailers

12 retailers$1,135 AUD to $4,379 AUD

A
Cheapest Retailer
-
$1,135 AUD
B+
Retailer 2
-
$1,396 AUD
View
B+
Retailer 3
-
$1,397 AUD
View
B+
Retailer 4
-
$1,450 AUD
View
B+
Retailer 5
-
$1,589 AUD
View
B+
Retailer 6
-
$1,611 AUD
View
B+
Retailer 7
-
$1,629 AUD
View
B
Retailer 8
-
$1,998 AUD
View
B
Retailer 9
-
$2,045 AUD
View
B
Retailer 10
-
$2,554 AUD
View
B
Retailer 11
-
$2,672 AUD
View
Most Expensive
C
NZ Jewellers
44d00f5c-79bb-4548-a36f-0451d9eb35a0 · Nov 5
$4,379 AUD
$3,009 USD
View
11 more retailers have this diamond
Prices start from $1,135 AUDSave up to $3,244 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
0.90ct Heart
$1,135 AUD