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Radiant|Lab Grown|IGI

1.77ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG665410575

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

Certificate IGI LG665410575

Diamond specifications and retailer prices

From €297 EUR
$331 USD
As of October 30, 2026
Save €3,863 EUR (93%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: €4,160 EUR at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.77ct lab-grown radiant diamond

This 1.77ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG665410575 or 665410575. Listed at 30 retailers as of October 29, 2026, with prices from €297 to €4,160, a €3,863 spread on the same certified stone. Brilliant Earth lists it at €4,160. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.77
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.7°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665410575
Dimensions6.16 × 6.16 × 3.99 mm
L/W Ratio1.00
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
6.16 mm6.16 mm1.77 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665410575
Side View
Table 61.0%Crown 40.7°Girdle: MediumPavilion 33.9°Culet: NoneDepth 64.8%

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: €4,160 EUR|Low: €297 EUR|High: €4,160 EUR|Avg: €1,111 EUR
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 22
October 30, 2026
Retailer 3€297 EUR
Retailer 19€333 EUR
Retailer 10€426 EUR
Retailer 18€508 EUR
Retailer 4€521 EUR
Retailer 21€599 EUR
Retailer 8€609 EUR
Retailer 17€634 EUR
Retailer 2€661 EUR
Retailer 9€840 EUR
Retailer 16€860 EUR
Retailer 22€1,083 EUR
Retailer 5€1,224 EUR
Retailer 12€1,226 EUR
Retailer 14€1,238 EUR
Retailer 15€1,240 EUR
Retailer 7€1,395 EUR
Retailer 6€1,449 EUR
Retailer 13€1,487 EUR
Retailer 11€1,548 EUR
Retailer 20€2,399 EUR
Brilliant Earth€4,160 EUR

35 data points across 22 retailers

30 retailers€297 EUR to €4,160 EUR

A
Cheapest Retailer
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€297 EUR
$331 USD
Retailer 2
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€297 EUR
$331 USD
View
Price last confirmed 21 days ago
Retailer 3
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€310 EUR
$345 USD
View
Price last confirmed 30 days ago
A
Retailer 4
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€333 EUR
$371 USD
View
Final sale: no returns
Retailer 5
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€360 EUR
$401 USD
View
Price last confirmed 32 days ago
Retailer 6
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€369 EUR
$411 USD
View
Price last confirmed 27 days ago
Retailer 7
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€380 EUR
$423 USD
View
Price last confirmed 31 days ago
A
Retailer 8
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€426 EUR
HK$3,700 HKD
View
A
Retailer 9
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€508 EUR
$565 USD
View
A
Retailer 10
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€521 EUR
$580 USD
View
A
Retailer 11
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€599 EUR
View
A
Retailer 12
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€609 EUR
$678 USD
View
A
Retailer 13
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€634 EUR
ZAR 11,405 ZAR
View
A
Retailer 14
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€661 EUR
£579 GBP
View
A
Retailer 15
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€840 EUR
$935 USD
View
A
Retailer 16
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€860 EUR
A$1,473 AUD
View
A
Retailer 17
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€1,083 EUR
$1,205 USD
View
Retailer 18
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€1,187 EUR
$1,321 USD
View
Price last confirmed 19 days ago
B+
Retailer 19
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€1,187 EUR
$1,321 USD
View
B+
Retailer 20
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€1,224 EUR
$1,362 USD
View
B+
Retailer 21
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€1,226 EUR
$1,365 USD
View
Retailer 22
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€1,237 EUR
$1,377 USD
View
Price last confirmed 29 days ago
B+
Retailer 23
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€1,238 EUR
SGD 1,862 SGD
View
B+
Retailer 24
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€1,240 EUR
$1,380 USD
View
B+
Retailer 25
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€1,395 EUR
$1,553 USD
View
B+
Retailer 26
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€1,449 EUR
$1,613 USD
View
B+
Retailer 27
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€1,487 EUR
£1,303 GBP
View
Retailer 28
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€1,548 EUR
A$2,651 AUD
View
Price last confirmed 27 days ago
Retailer 29
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€2,399 EUR
$2,670 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
12598441A · Oct 29
€4,160 EUR
$4,630 USD
View
29 more retailers have this diamond
Prices start from €297 EURSave up to €3,863 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
1.77ct Radiant
€297 EUR