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 €190 EUR
$212 USD
As of October 30, 2026
Save €1,673 EUR (90%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: €1,863 EUR at Helzberg Diamonds · As of October 31, 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 21 retailers as of October 30, 2026, with prices from €190 to €1,863, a €1,673 spread on the same certified stone. Helzberg Diamonds lists it at €1,863. 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 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: Oct 30
Current: €1,863 EUR|Low: €190 EUR|High: €2,211 EUR|Avg: €707 EUR
Helzberg Diamonds
Retailer 2
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Retailer 21
October 31, 2026
Retailer 6€190 EUR
Retailer 11€212 EUR
Retailer 3€219 EUR
Retailer 4€235 EUR
Retailer 8€235 EUR
Retailer 21€243 EUR
Retailer 18€403 EUR
Retailer 7€404 EUR
Retailer 2€428 EUR
Retailer 13€434 EUR
Retailer 10€455 EUR
Retailer 19€574 EUR
Retailer 15€609 EUR
Retailer 5€747 EUR
Retailer 9€755 EUR
Retailer 12€802 EUR
Retailer 14€896 EUR
Retailer 17€946 EUR
Retailer 20€1,660 EUR
Retailer 16€1,674 EUR
Helzberg Diamonds€1,863 EUR

24 data points across 21 retailers

21 retailers€190 EUR to €1,863 EUR

A
Cheapest Retailer
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€190 EUR
$212 USD
A
Retailer 2
-
€212 EUR
$237 USD
View
Final sale: no returns
A
Retailer 3
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€219 EUR
$245 USD
View
A
Retailer 4
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€235 EUR
$262 USD
View
A
Retailer 5
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€235 EUR
$262 USD
View
Retailer 6
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€243 EUR
£214 GBP
View
Price last confirmed 15 days ago
A
Retailer 7
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€403 EUR
ZAR 7,282 ZAR
View
A
Retailer 8
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€404 EUR
$451 USD
View
A
Retailer 9
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€428 EUR
View
A
Retailer 10
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€434 EUR
£382 GBP
View
A
Retailer 11
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€455 EUR
$508 USD
View
A
Retailer 12
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€574 EUR
A$987 AUD
View
A
Retailer 13
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€609 EUR
$680 USD
View
B+
Retailer 14
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€747 EUR
$835 USD
View
B+
Retailer 15
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€755 EUR
$843 USD
View
B+
Retailer 16
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€802 EUR
$897 USD
View
B+
Retailer 17
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€888 EUR
$992 USD
View
B+
Retailer 18
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€946 EUR
£832 GBP
View
Retailer 19
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€1,660 EUR
$1,855 USD
View
Price last confirmed 14 days ago
B
Retailer 20
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€1,674 EUR
$1,870 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOJMMHNPKJ · Oct 31
€1,863 EUR
$2,081 USD
View
20 more retailers have this diamond
Prices start from €190 EURSave up to €1,673 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
€190 EUR