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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 €308 EUR
$344 USD
As of November 1, 2026
Save €1,070 EUR (78%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €1,378 EUR 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 €308 to €1,378, a €1,070 spread on the same certified stone. Reve Diamonds lists it at €1,378. 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: €590 EUR|Low: €265 EUR|High: €1,388 EUR|Avg: €744 EUR|+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€276 EUR
Retailer 7€308 EUR
Retailer 3€342 EUR
Retailer 5€342 EUR
Retailer 15€461 EUR
Retailer 13€483 EUR
Retailer 11€555 EUR
Retailer 1€590 EUR
Retailer 10€609 EUR
Retailer 2€726 EUR
Retailer 12€835 EUR
Retailer 14€1,052 EUR
Retailer 6€1,098 EUR
Retailer 4€1,100 EUR
Retailer 8€1,142 EUR
Retailer 9€1,372 EUR
Reve Diamonds€1,378 EUR

40 data points across 17 retailers

19 retailers€308 EUR to €1,378 EUR

Retailer 1
-
€276 EUR
$308 USD
Price last confirmed 9 days ago
A
Retailer 2
-
€308 EUR
$344 USD
View
Final sale: no returns
Retailer 3
-
€320 EUR
$358 USD
View
Price last confirmed 34 days ago
Retailer 4
-
€342 EUR
$382 USD
View
Price last confirmed 7 days ago
Retailer 5
-
€342 EUR
$382 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
€378 EUR
HK$3,300 HKD
View
A
Retailer 7
-
€461 EUR
$515 USD
View
A
Retailer 8
-
€483 EUR
$540 USD
View
A
Retailer 9
-
€555 EUR
View
A
Retailer 10
-
€590 EUR
ZAR 10,653 ZAR
View
B+
Retailer 11
-
€609 EUR
£536 GBP
View
B+
Retailer 12
-
€726 EUR
$811 USD
View
B+
Retailer 13
-
€835 EUR
A$1,435 AUD
View
B
Retailer 14
-
€1,052 EUR
$1,175 USD
View
B
Retailer 15
-
€1,098 EUR
SGD 1,658 SGD
View
Retailer 16
-
€1,100 EUR
$1,229 USD
View
Price last confirmed 7 days ago
B
Retailer 17
-
€1,142 EUR
$1,276 USD
View
B
Retailer 18
-
€1,372 EUR
£1,207 GBP
View
Most Expensive
B
Reve Diamonds
7DB8BD3DA · Nov 1
€1,378 EUR
$1,539 USD
View
18 more retailers have this diamond
Prices start from €308 EURSave up to €1,070 EUR

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
€308 EUR