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Round|Lab Grown|GIA

1.78ct D SI2 Round Lab Grown Diamond

EX • D/SI2 • GIA 2457007520

Certificate GIA 2457007520

Diamond specifications and retailer prices

From €369 EUR
$411 USD
As of October 29, 2026
Save €1,430 EUR (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €1,799 EUR at MOH London · As of October 29, 2026
View at MOH London

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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2457007520. Listed at 15 retailers as of October 29, 2026, with prices from €369 to €1,799, a €1,430 spread on the same certified stone. MOH London lists it at €1,799. 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.6°
OriginLab Grown
Grading LabGIA
CertificateGIA 2457007520
Dimensions7.80 × 7.78 × 4.80 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
7.80 mm7.78 mm1.78 ctD / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2457007520
Side View
Table 56.0%Crown 35°Girdle: NUL-NULPavilion 40.6°Culet: NoneDepth 61.6%

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: €1,799 EUR|Low: €355 EUR|High: €1,811 EUR|Avg: €796 EUR|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 10€369 EUR
Retailer 13€413 EUR
Retailer 5€458 EUR
Retailer 11€458 EUR
Retailer 4€620 EUR
Retailer 12€685 EUR
Retailer 6€685 EUR
Retailer 7€739 EUR
Retailer 9€809 EUR
Retailer 2€952 EUR
Retailer 8€1,112 EUR
Retailer 3€1,473 EUR
MOH London€1,799 EUR

44 data points across 13 retailers

15 retailers€369 EUR to €1,799 EUR

A
Cheapest Retailer
-
€369 EUR
$411 USD
A
Retailer 2
-
€413 EUR
$460 USD
View
A
Retailer 3
-
€458 EUR
$510 USD
View
A
Retailer 4
-
€458 EUR
$510 USD
View
A
Retailer 5
-
€506 EUR
HK$4,400 HKD
View
B+
Retailer 6
-
€620 EUR
$690 USD
View
B+
Retailer 7
-
€685 EUR
$762 USD
View
B+
Retailer 8
-
€685 EUR
£600 GBP
View
B+
Retailer 9
-
€739 EUR
View
B+
Retailer 10
-
€809 EUR
$900 USD
View
B+
Retailer 11
-
€852 EUR
$948 USD
View
B+
Retailer 12
-
€952 EUR
$1,060 USD
View
B
Retailer 13
-
€1,112 EUR
$1,238 USD
View
B
Retailer 14
-
€1,473 EUR
$1,639 USD
View
Most Expensive
B
MOH London
2457007520 · Oct 29
€1,799 EUR
£1,577 GBP
View
14 more retailers have this diamond
Prices start from €369 EURSave up to €1,430 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
€369 EUR