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Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG731537069

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG731537069

Diamond specifications and retailer prices

From €187 EUR
$209 USD
As of October 27, 2026
Save €2,006 EUR (91%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €2,193 EUR at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG731537069 or 731537069. Listed at 17 retailers as of October 27, 2026, with prices from €187 to €2,193, a €2,006 spread on the same certified stone. Brilliant Earth lists it at €2,193. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731537069
Dimensions7.61 × 5.54 × 3.54 mm
L/W Ratio1.37
Culet sizePointed
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
7.61 mm5.54 mm1.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731537069
Side View
Table 67.0%Crown 41°Girdle: Slightly ThickPavilion 34.7°Culet: NoneDepth 63.9%

Caratlytics Score

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A+
Exceptional
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: Oct 27
Current: €2,193 EUR|Low: €175 EUR|High: €2,265 EUR|Avg: €857 EUR|-3.2%
Brilliant Earth
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
Retailer 17
November 2, 2026
Retailer 16€187 EUR
Retailer 14€210 EUR
Retailer 7€218 EUR
Retailer 5€284 EUR
Retailer 3€317 EUR
Retailer 8€414 EUR
Retailer 2€492 EUR
Retailer 12€587 EUR
Retailer 15€625 EUR
Retailer 17€676 EUR
Retailer 6€797 EUR
Retailer 4€823 EUR
Retailer 13€991 EUR
Retailer 10€1,036 EUR
Retailer 9€1,750 EUR
Retailer 11€1,808 EUR
Brilliant Earth€2,193 EUR

37 data points across 17 retailers

17 retailers€187 EUR to €2,193 EUR

A+
Cheapest Retailer
-
€187 EUR
$209 USD
A
Retailer 2
-
€210 EUR
$235 USD
View
Final sale: no returns
A
Retailer 3
-
€218 EUR
$243 USD
View
A
Retailer 4
-
€284 EUR
$317 USD
View
B+
Retailer 5
-
€317 EUR
$354 USD
View
Retailer 6
-
€414 EUR
View
Price last confirmed 9 days ago
A
Retailer 7
-
€492 EUR
£433 GBP
View
A
Retailer 8
-
€587 EUR
$656 USD
View
A
Retailer 9
-
€625 EUR
A$1,075 AUD
View
B+
Retailer 10
-
€676 EUR
$755 USD
View
B+
Retailer 11
-
€797 EUR
$890 USD
View
Retailer 12
-
€823 EUR
$920 USD
View
Price last confirmed 7 days ago
B+
Retailer 13
-
€991 EUR
$1,107 USD
View
B+
Retailer 14
-
€1,036 EUR
£911 GBP
View
Retailer 15
-
€1,750 EUR
$1,955 USD
View
Price last confirmed 14 days ago
B
Retailer 16
-
€1,808 EUR
$2,020 USD
View
Most Expensive
B
Brilliant Earth
21405859Y · Oct 28
€2,193 EUR
$2,450 USD
View
16 more retailers have this diamond
Prices start from €187 EURSave up to €2,006 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+
1.28ct Radiant
€187 EUR