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Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG836617943

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

Certificate IGI LG836617943

Diamond specifications and retailer prices

From €188 EUR
As of November 4, 2026
Save €1,659 EUR (90%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €1,847 EUR at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

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 LG836617943 or 836617943. Listed at 20 retailers as of November 4, 2026, with prices from €188 to €1,847, a €1,659 spread on the same certified stone. Helzberg Diamonds lists it at €1,847. 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 angle40.9°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836617943
Dimensions8.00 × 5.43 × 3.57 mm
L/W Ratio1.47
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
8.00 mm5.43 mm1.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836617943
Side View
Table 66.0%Crown 40.9°Girdle: MediumPavilion 35.1°Culet: NoneDepth 65.7%

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: €1,847 EUR|Low: €188 EUR|High: €2,192 EUR|Avg: €693 EUR
Helzberg Diamonds
Retailer 2
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Retailer 21
November 5, 2026
Retailer 6€188 EUR
Retailer 11€210 EUR
Retailer 3€217 EUR
Retailer 4€233 EUR
Retailer 8€233 EUR
Retailer 21€241 EUR
Retailer 7€400 EUR
Retailer 17€401 EUR
Retailer 18€423 EUR
Retailer 2€426 EUR
Retailer 10€451 EUR
Retailer 15€569 EUR
Retailer 16€610 EUR
Retailer 5€741 EUR
Retailer 9€748 EUR
Retailer 12€795 EUR
Retailer 14€888 EUR
Retailer 13€931 EUR
Retailer 20€1,646 EUR
Retailer 19€1,660 EUR
Helzberg Diamonds€1,847 EUR

29 data points across 21 retailers

20 retailers€188 EUR to €1,847 EUR

A
Cheapest Retailer
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€188 EUR
A
Retailer 2
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€210 EUR
View
Final sale: no returns
A
Retailer 3
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€217 EUR
View
A
Retailer 4
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€233 EUR
View
Retailer 5
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€233 EUR
View
Price last confirmed 11 days ago
A
Retailer 6
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€400 EUR
View
A
Retailer 7
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€401 EUR
View
A
Retailer 8
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€423 EUR
View
A
Retailer 9
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€426 EUR
View
A
Retailer 10
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€451 EUR
View
A
Retailer 11
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€569 EUR
View
A
Retailer 12
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€610 EUR
View
B+
Retailer 13
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€741 EUR
View
B+
Retailer 14
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€748 EUR
View
B+
Retailer 15
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€795 EUR
View
B+
Retailer 16
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€880 EUR
View
B+
Retailer 17
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€931 EUR
View
Retailer 18
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€1,646 EUR
View
Price last confirmed 18 days ago
B
Retailer 19
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€1,660 EUR
View
Most Expensive
B
Helzberg Diamonds
ZXZOJMMHNPKJ · Nov 4
€1,847 EUR
$2,081 USD
View
19 more retailers have this diamond
Prices start from €188 EURSave up to €1,659 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
€188 EUR