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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 $575 CAD
$411 USD
As of October 29, 2026
Save $2,228 CAD (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,803 CAD 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 $575 to $2,803, a $2,228 spread on the same certified stone. MOH London lists it at $2,803. 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
Color
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: $2,803 CAD|Low: $553 CAD|High: $2,821 CAD|Avg: $1,237 CAD|+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 29, 2026
Retailer 9$575 CAD
Retailer 13$644 CAD
Retailer 5$714 CAD
Retailer 11$714 CAD
Retailer 4$966 CAD
Retailer 2$1,064 CAD
Retailer 12$1,066 CAD
Retailer 6$1,151 CAD
Retailer 8$1,260 CAD
Retailer 10$1,694 CAD
Retailer 7$1,733 CAD
Retailer 3$2,294 CAD
MOH London$2,803 CAD

44 data points across 13 retailers

15 retailers$575 CAD to $2,803 CAD

A
Cheapest Retailer
-
$575 CAD
$411 USD
A
Retailer 2
-
$644 CAD
$460 USD
View
A
Retailer 3
-
$714 CAD
$510 USD
View
A
Retailer 4
-
$714 CAD
$510 USD
View
A
Retailer 5
-
$788 CAD
HK$4,400 HKD
View
B+
Retailer 6
-
$966 CAD
$690 USD
View
B+
Retailer 7
-
$1,064 CAD
£598 GBP
View
B+
Retailer 8
-
$1,066 CAD
$762 USD
View
B+
Retailer 9
-
$1,151 CAD
€783 EUR
View
B+
Retailer 10
-
$1,260 CAD
$900 USD
View
B+
Retailer 11
-
$1,327 CAD
$948 USD
View
B
Retailer 12
-
$1,694 CAD
$1,210 USD
View
B
Retailer 13
-
$1,733 CAD
$1,238 USD
View
B
Retailer 14
-
$2,294 CAD
$1,639 USD
View
Most Expensive
B
MOH London
2457007520 · Oct 29
$2,803 CAD
£1,577 GBP
View
14 more retailers have this diamond
Prices start from $575 CADSave up to $2,228 CAD

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
$575 CAD