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Heart|Natural|IGI

1.20ct K SI1 Heart Natural Diamond

GD • K/SI1 • IGI 270787421

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI 270787421

Diamond specifications and retailer prices

From $1,668 AUD
As of November 6, 2026
Save $1,302 AUD (44%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $2,970 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI 270787421. Listed at 4 retailers as of November 4, 2026, with prices from $1,668 to $2,970, a $1,302 spread on the same certified stone. MOH London lists it at $2,970. 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

1.20
Carat
K
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishGood
SymmetryGood
FluorescenceFaint
Crown angle39°
Pavilion angle32.8°
OriginNatural
Grading LabIGI
CertificateIGI 270787421
Dimensions6.50 × 5.65 × 3.93 mm
L/W Ratio1.15
Girdle conditionFaceted
Culet sizePointed
Top View
6.50 mm5.65 mm1.20 ctK / SI1
OriginNatural
CutGood
PolishGood
SymmetryGood
FluorescenceFaint
CertificateIGI 270787421
Side View
Table 54.5%Crown 39°Girdle: STK-VTKPavilion 32.8°Culet: NoneDepth 69.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,970 AUD|Low: $1,457 AUD|High: $3,015 AUD|Avg: $2,008 AUD|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 5$1,457 AUD
Retailer 4$1,668 AUD
Retailer 3$1,864 AUD
Retailer 2$2,266 AUD
MOH London$2,970 AUD

40 data points across 5 retailers

4 retailers$1,668 AUD to $2,970 AUD

B+
Cheapest Retailer
-
$1,668 AUD
B+
Retailer 2
-
$1,864 AUD
View
B+
Retailer 3
-
$2,266 AUD
View
Most Expensive
B
MOH London
47E42449B · Nov 4
$2,970 AUD
£1,607 GBP
View
3 more retailers have this diamond
Prices start from $1,668 AUDSave up to $1,302 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.

B+
1.20ct Heart
$1,668 AUD