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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 $527 SGD
$411 USD
As of October 29, 2026
Save $2,040 SGD (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,567 SGD 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 $527 to $2,567, a $2,040 spread on the same certified stone. MOH London lists it at $2,567. 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

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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: $2,567 SGD|Low: $506 SGD|High: $2,583 SGD|Avg: $1,135 SGD|+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$527 SGD
Retailer 13$590 SGD
Retailer 5$654 SGD
Retailer 11$654 SGD
Retailer 4$884 SGD
Retailer 2$974 SGD
Retailer 12$977 SGD
Retailer 6$1,054 SGD
Retailer 8$1,154 SGD
Retailer 10$1,551 SGD
Retailer 7$1,587 SGD
Retailer 3$2,101 SGD
MOH London$2,567 SGD

43 data points across 13 retailers

15 retailers$527 SGD to $2,567 SGD

A
Cheapest Retailer
-
$527 SGD
$411 USD
A
Retailer 2
-
$590 SGD
$460 USD
View
A
Retailer 3
-
$654 SGD
$510 USD
View
A
Retailer 4
-
$654 SGD
$510 USD
View
A
Retailer 5
-
$722 SGD
HK$4,400 HKD
View
B+
Retailer 6
-
$884 SGD
$690 USD
View
B+
Retailer 7
-
$974 SGD
£598 GBP
View
B+
Retailer 8
-
$977 SGD
$762 USD
View
B+
Retailer 9
-
$1,054 SGD
€783 EUR
View
B+
Retailer 10
-
$1,154 SGD
$900 USD
View
B+
Retailer 11
-
$1,215 SGD
$948 USD
View
B
Retailer 12
-
$1,551 SGD
$1,210 USD
View
B
Retailer 13
-
$1,587 SGD
$1,238 USD
View
B
Retailer 14
-
$2,101 SGD
$1,639 USD
View
Most Expensive
B
MOH London
2457007520 · Oct 29
$2,567 SGD
£1,577 GBP
View
14 more retailers have this diamond
Prices start from $527 SGDSave up to $2,040 SGD

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
$527 SGD