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Heart|Lab Grown|IGI

1.21ct D IF Heart Lab Grown Diamond

VG • D/IF • IGI LG836619501

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG836619501

Diamond specifications and retailer prices

From $353 AUD
As of November 4, 2026
Save $2,490 AUD (88%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,843 AUD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.21ct lab-grown heart diamond

This 1.21ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG836619501 or 836619501. Listed at 20 retailers as of November 4, 2026, with prices from $353 to $2,843, a $2,490 spread on the same certified stone. Brilliant Earth lists it at $2,843. 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

1.21
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle37.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836619501
Dimensions6.64 × 7.31 × 4.24 mm
L/W Ratio1.10
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.64 mm7.31 mm1.21 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836619501
Side View
Table 54.0%Crown 34.9°Girdle: STK-THKPavilion 37.7°Culet: NoneDepth 58.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $447 AUD|Low: $353 AUD|High: $1,776 AUD|Avg: $912 AUD|-7.4%
Retailer 1
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Retailer 3
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Retailer 12
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Retailer 19
Retailer 20
November 5, 2026
Retailer 7$353 AUD
Retailer 3$396 AUD
Retailer 19$410 AUD
Retailer 6$439 AUD
Retailer 10$439 AUD
Retailer 1$447 AUD
Retailer 13$693 AUD
Retailer 5$736 AUD
Retailer 18$750 AUD
Retailer 17$756 AUD
Retailer 4$777 AUD
Retailer 12$823 AUD
Retailer 15$1,071 AUD
Retailer 8$1,097 AUD
Retailer 16$1,114 AUD
Retailer 11$1,407 AUD
Retailer 2$1,461 AUD
Retailer 9$1,481 AUD
Retailer 20$1,594 AUD
Retailer 14$1,750 AUD

30 data points across 20 retailers

20 retailers$353 AUD to $2,843 AUD

A
Cheapest Retailer
-
$353 AUD
A
Retailer 2
-
$396 AUD
View
Final sale: no returns
A
Retailer 3
-
$410 AUD
View
A
Retailer 4
-
$439 AUD
View
Retailer 5
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$439 AUD
View
Price last confirmed 11 days ago
A
Retailer 6
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$447 AUD
View
A
Retailer 7
-
$736 AUD
View
A
Retailer 8
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$750 AUD
View
A
Retailer 9
-
$756 AUD
View
A
Retailer 10
-
$777 AUD
View
A
Retailer 11
-
$823 AUD
View
B+
Retailer 12
-
$1,071 AUD
View
B+
Retailer 13
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$1,097 AUD
View
B+
Retailer 14
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$1,114 AUD
View
B+
Retailer 15
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$1,407 AUD
View
B+
Retailer 16
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$1,461 AUD
View
B+
Retailer 17
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$1,481 AUD
View
B+
Retailer 18
-
$1,594 AUD
View
B
Retailer 19
-
$1,750 AUD
View
Most Expensive
B
Brilliant Earth
21695593A · Nov 4
$2,843 AUD
$1,990 USD
View
19 more retailers have this diamond
Prices start from $353 AUDSave up to $2,490 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
1.21ct Heart
$353 AUD