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Round|Lab Grown|IGI

1.77ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG620415433

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620415433

Diamond specifications and retailer prices

From €221 EUR
$247 USD
As of October 29, 2026
Save €1,247 EUR (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €1,468 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.77ct lab-grown round diamond

This 1.77ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620415433 or 620415433. Listed at 19 retailers as of October 29, 2026, with prices from €221 to €1,468, a €1,247 spread on the same certified stone. Brilliant Earth lists it at €1,468. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.77
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620415433
Dimensions7.82 × 7.86 × 4.75 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.82 mm7.86 mm1.77 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620415433
Side View
Table 59.0%Crown 33.2°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.6%

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 29
Current: €1,468 EUR|Low: €212 EUR|High: €1,647 EUR|Avg: €623 EUR|+9.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 8€221 EUR
Retailer 9€274 EUR
Retailer 10€274 EUR
Retailer 7€369 EUR
Retailer 5€449 EUR
Retailer 3€473 EUR
Retailer 4€520 EUR
Retailer 6€884 EUR
Retailer 2€1,099 EUR
Brilliant Earth€1,468 EUR

37 data points across 10 retailers

19 retailers€221 EUR to €1,468 EUR

A
Cheapest Retailer
-
€221 EUR
$247 USD
Retailer 2
-
€221 EUR
$247 USD
View
Price last confirmed 37 days ago
A
Retailer 3
-
€248 EUR
$277 USD
View
Final sale: no returns
Retailer 4
-
€257 EUR
$287 USD
View
Price last confirmed 39 days ago
Retailer 5
-
€270 EUR
$302 USD
View
Price last confirmed 36 days ago
A
Retailer 6
-
€274 EUR
$306 USD
View
A
Retailer 7
-
€274 EUR
$306 USD
View
A
Retailer 8
-
€309 EUR
HK$2,700 HKD
View
B+
Retailer 9
-
€369 EUR
$412 USD
View
A
Retailer 10
-
€449 EUR
View
A
Retailer 11
-
€473 EUR
£416 GBP
View
B+
Retailer 12
-
€508 EUR
$567 USD
View
A
Retailer 13
-
€520 EUR
£457 GBP
View
B+
Retailer 14
-
€575 EUR
$642 USD
View
B
Retailer 15
-
€882 EUR
$985 USD
View
Retailer 16
-
€882 EUR
$985 USD
View
Price last confirmed 41 days ago
B
Retailer 17
-
€884 EUR
$988 USD
View
B
Retailer 18
-
€1,099 EUR
£967 GBP
View
Most Expensive
B
Brilliant Earth
19043514A · Oct 31
€1,468 EUR
$1,640 USD
View
18 more retailers have this diamond
Prices start from €221 EURSave up to €1,247 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 Round
€221 EUR