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Heart|Lab Grown|IGI

1.23ct D IF Heart Lab Grown Diamond

EX • D/IF • IGI LG821616173

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG821616173

Diamond specifications and retailer prices

From $491 AUD
As of November 4, 2026
Save $1,708 AUD (78%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,199 AUD at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.23ct lab-grown heart diamond

This 1.23ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG821616173 or 821616173. Listed at 19 retailers as of November 4, 2026, with prices from $491 to $2,199, a $1,708 spread on the same certified stone. Reve Diamonds lists it at $2,199. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821616173
Dimensions7.47 × 6.81 × 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
7.47 mm6.81 mm1.23 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821616173
Side View
Table 61.0%Crown 33.7°Girdle: MED-STKPavilion 39.3°Culet: NoneDepth 56.8%

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: $961 AUD|Low: $423 AUD|High: $2,214 AUD|Avg: $1,119 AUD|+2.1%
Retailer 1
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
Retailer 16
November 5, 2026
Retailer 16$440 AUD
Retailer 7$491 AUD
Retailer 3$546 AUD
Retailer 5$546 AUD
Retailer 15$736 AUD
Retailer 13$771 AUD
Retailer 12$886 AUD
Retailer 11$941 AUD
Retailer 1$961 AUD
Retailer 2$1,159 AUD
Retailer 10$1,341 AUD
Retailer 14$1,678 AUD
Retailer 6$1,751 AUD
Retailer 4$1,756 AUD
Retailer 8$1,821 AUD
Retailer 9$2,181 AUD

40 data points across 16 retailers

19 retailers$491 AUD to $2,199 AUD

Retailer 1
-
$440 AUD
Price last confirmed 13 days ago
A
Retailer 2
-
$491 AUD
View
Final sale: no returns
Retailer 3
-
$511 AUD
View
Price last confirmed 37 days ago
Retailer 4
-
$546 AUD
View
Price last confirmed 11 days ago
Retailer 5
-
$546 AUD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$603 AUD
View
A
Retailer 7
-
$736 AUD
View
A
Retailer 8
-
$771 AUD
View
A
Retailer 9
-
$886 AUD
View
A
Retailer 10
-
$941 AUD
View
A
Retailer 11
-
$961 AUD
View
B+
Retailer 12
-
$1,159 AUD
View
B+
Retailer 13
-
$1,341 AUD
View
B
Retailer 14
-
$1,678 AUD
View
B
Retailer 15
-
$1,751 AUD
View
Retailer 16
-
$1,756 AUD
View
Price last confirmed 11 days ago
B
Retailer 17
-
$1,821 AUD
View
B
Retailer 18
-
$2,181 AUD
View
Most Expensive
B
Reve Diamonds
7DB8BD3DA · Nov 4
$2,199 AUD
$1,539 USD
View
18 more retailers have this diamond
Prices start from $491 AUDSave up to $1,708 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
1.23ct Heart
$491 AUD