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Round|Lab Grown|GIA

1.78ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • GIA 2487040493

Certificate GIA 2487040493

Diamond specifications and retailer prices

From €531 EUR
$593 USD
As of October 30, 2026
Save €1,215 EUR (70%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: €1,745 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2487040493. Listed at 5 retailers as of October 29, 2026, with prices from €531 to €1,745, a €1,215 spread on the same certified stone. Brilliant Earth lists it at €1,745. 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

1.78
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.6°
OriginLab Grown
Grading LabGIA
CertificateGIA 2487040493
Dimensions7.76 × 7.80 × 4.81 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Girdle conditionFaceted
Culet sizeNone
Cert comments
This is a man-made diamond produced by CVD (Chemical Vapor Deposition) growth process and has evidence of post-growth treatments to change the color.
Key to symbols
Growth Remnant
Top View
7.76 mm7.80 mm1.78 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2487040493
Side View
Table 59.0%Crown 34°Girdle: MediumPavilion 41.6°Culet: NoneDepth 61.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: €1,745 EUR|Low: €531 EUR|High: €2,566 EUR|Avg: €1,529 EUR
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 4€531 EUR
Retailer 3€768 EUR
Retailer 5€791 EUR
Retailer 2€938 EUR
Brilliant Earth€1,745 EUR
Retailer 7€2,544 EUR
Retailer 6€2,566 EUR

7 data points across 7 retailers

5 retailers€531 EUR to €1,745 EUR

A
Cheapest Retailer
-
€531 EUR
$593 USD
B+
Retailer 2
-
€768 EUR
HK$6,700 HKD
View
B+
Retailer 3
-
€791 EUR
$884 USD
View
B+
Retailer 4
-
€938 EUR
View
Most Expensive
B
Brilliant Earth
8686788A · Oct 29
€1,745 EUR
$1,950 USD
View
4 more retailers have this diamond
Prices start from €531 EURSave up to €1,215 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
€531 EUR