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 €209 EUR
As of November 4, 2026
Save €1,584 EUR (88%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €2,174 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 16 retailers as of November 4, 2026, with a 760% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Colour
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

How it works →
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: €2,174 EUR|Low: €173 EUR|High: €2,246 EUR|Avg: €830 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 5, 2026
Retailer 16€185 EUR
Retailer 14€209 EUR
Retailer 7€216 EUR
Retailer 5€281 EUR
Retailer 3€314 EUR
Retailer 8€410 EUR
Retailer 2€483 EUR
Retailer 12€582 EUR
Retailer 15€620 EUR
Retailer 17€670 EUR
Retailer 6€790 EUR
Retailer 4€817 EUR
Retailer 13€982 EUR
Retailer 10€1,026 EUR
Retailer 9€1,735 EUR
Retailer 11€1,793 EUR
Brilliant Earth€2,174 EUR

37 data points across 17 retailers

16 retailers€209 EUR to €1,793 EUR

Retailer 1
-
€185 EUR
Price last confirmed 9 days ago
A
Retailer 2
-
€209 EUR
View
Final sale: no returns
Retailer 3
-
€216 EUR
View
Price last confirmed 8 days ago
A
Retailer 4
-
€281 EUR
View
B+
Retailer 5
-
€314 EUR
View
A
Retailer 6
-
€483 EUR
View
A
Retailer 7
-
€582 EUR
View
Retailer 8
-
€620 EUR
View
Price last confirmed 9 days ago
Retailer 9
-
€670 EUR
View
Price last confirmed 10 days ago
Retailer 10
-
€790 EUR
View
Price last confirmed 9 days ago
Retailer 11
-
€817 EUR
View
Price last confirmed 11 days ago
B+
Retailer 12
-
€982 EUR
View
B+
Retailer 13
-
€1,026 EUR
View
Retailer 14
-
€1,735 EUR
View
Price last confirmed 18 days ago
B
Retailer 15
-
€1,793 EUR
View
Most Expensive
Brilliant Earth
21405859Y · Oct 28
€2,174 EUR
$2,450 USD
View
Price last confirmed 7 days ago
15 more retailers have this diamond
Prices start from €209 EURSave up to €1,584 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
€209 EUR