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 $344 USD
As of November 1, 2026
Save $1,195 USD (78%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,539 USD at Reve Diamonds · As of November 1, 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 1, 2026, with prices from $344 to $1,539, a $1,195 spread on the same certified stone. Reve Diamonds lists it at $1,539. 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
Color
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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Price History

Last verified: Nov 1
Current: $659 USD|Low: $296 USD|High: $1,551 USD|Avg: $831 USD|+2.6%
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
Reve Diamonds
November 2, 2026
Retailer 16$308 USD
Retailer 7$344 USD
Retailer 3$382 USD
Retailer 5$382 USD
Retailer 15$515 USD
Retailer 13$540 USD
Retailer 11$621 USD
Retailer 1$659 USD
Retailer 10$680 USD
Retailer 2$811 USD
Retailer 12$933 USD
Retailer 14$1,175 USD
Retailer 6$1,227 USD
Retailer 4$1,229 USD
Retailer 8$1,276 USD
Retailer 9$1,533 USD
Reve Diamonds$1,539 USD

40 data points across 17 retailers

19 retailers$344 USD to $1,539 USD

Retailer 1
-
$308 USD
Price last confirmed 9 days ago
A
Retailer 2
-
$344 USD
View
Final sale: no returns
Retailer 3
-
$358 USD
View
Price last confirmed 34 days ago
Retailer 4
-
$382 USD
View
Price last confirmed 7 days ago
Retailer 5
-
$382 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$422 USD
HK$3,300 HKD
View
A
Retailer 7
-
$515 USD
View
A
Retailer 8
-
$540 USD
View
A
Retailer 9
-
$621 USD
€591 EUR
View
A
Retailer 10
-
$659 USD
ZAR 10,653 ZAR
View
B+
Retailer 11
-
$680 USD
£536 GBP
View
B+
Retailer 12
-
$811 USD
View
B+
Retailer 13
-
$933 USD
A$1,435 AUD
View
B
Retailer 14
-
$1,175 USD
View
B
Retailer 15
-
$1,227 USD
SGD 1,658 SGD
View
Retailer 16
-
$1,229 USD
View
Price last confirmed 7 days ago
B
Retailer 17
-
$1,276 USD
View
B
Retailer 18
-
$1,533 USD
£1,207 GBP
View
Most Expensive
B
Reve Diamonds
7DB8BD3DA · Nov 1
$1,539 USD
View
18 more retailers have this diamond
Prices start from $344 USDSave up to $1,195 USD

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
$344 USD