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Round|Lab Grown|IGI

1.78ct E SI2 Round Lab Grown Diamond

VG • E/SI2 • IGI LG786624855

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786624855

Diamond specifications and retailer prices

From €203 EUR
$226 USD
As of October 29, 2026
Save €1,172 EUR (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €1,375 EUR at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.78ct lab-grown round diamond

This 1.78ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG786624855 or 786624855. Listed at 13 retailers as of October 29, 2026, with prices from €203 to €1,375, a €1,172 spread on the same certified stone. Brilliant Earth lists it at €1,375. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.78
Carat
E
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786624855
Dimensions7.74 × 7.62 × 4.78 mm
L/W Ratio1.02
Girdle conditionFaceted
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
7.74 mm7.62 mm1.78 ctE / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786624855
Side View
Table 59.0%Crown 37°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.1%

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: Oct 29
Current: €1,375 EUR|Low: €194 EUR|High: €1,375 EUR|Avg: €569 EUR
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 9€203 EUR
Retailer 11€227 EUR
Retailer 3€252 EUR
Retailer 6€416 EUR
Retailer 12€427 EUR
Retailer 2€468 EUR
Retailer 10€488 EUR
Retailer 4€613 EUR
Retailer 8€682 EUR
Retailer 7€728 EUR
Retailer 5€1,012 EUR
Brilliant Earth€1,375 EUR

30 data points across 12 retailers

13 retailers€203 EUR to €1,375 EUR

A
Cheapest Retailer
-
€203 EUR
$226 USD
A
Retailer 2
-
€227 EUR
$253 USD
View
Final sale: no returns
A
Retailer 3
-
€252 EUR
$280 USD
View
A
Retailer 4
-
€416 EUR
View
B+
Retailer 5
-
€427 EUR
$475 USD
View
B+
Retailer 6
-
€468 EUR
£410 GBP
View
B+
Retailer 7
-
€488 EUR
$543 USD
View
B+
Retailer 8
-
€613 EUR
$682 USD
View
B
Retailer 9
-
€682 EUR
$759 USD
View
B
Retailer 10
-
€728 EUR
$810 USD
View
Retailer 11
-
€750 EUR
$835 USD
View
Price last confirmed 45 days ago
B
Retailer 12
-
€1,012 EUR
£887 GBP
View
Most Expensive
B
Brilliant Earth
19892742A · Oct 29
€1,375 EUR
$1,530 USD
View
12 more retailers have this diamond
Prices start from €203 EURSave up to €1,172 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
1.78ct Round
€203 EUR