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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 $585 AUD
$411 USD
As of October 29, 2026
Save $2,266 AUD (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,851 AUD 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 $585 to $2,851, a $2,266 spread on the same certified stone. MOH London lists it at $2,851. 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: $2,851 AUD|Low: $562 AUD|High: $2,869 AUD|Avg: $1,258 AUD|+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$585 AUD
Retailer 13$655 AUD
Retailer 5$726 AUD
Retailer 11$726 AUD
Retailer 4$982 AUD
Retailer 2$1,082 AUD
Retailer 12$1,085 AUD
Retailer 6$1,170 AUD
Retailer 8$1,281 AUD
Retailer 10$1,722 AUD
Retailer 7$1,762 AUD
Retailer 3$2,333 AUD
MOH London$2,851 AUD

44 data points across 13 retailers

15 retailers$585 AUD to $2,851 AUD

A
Cheapest Retailer
-
$585 AUD
$411 USD
A
Retailer 2
-
$655 AUD
$460 USD
View
A
Retailer 3
-
$726 AUD
$510 USD
View
A
Retailer 4
-
$726 AUD
$510 USD
View
A
Retailer 5
-
$802 AUD
HK$4,400 HKD
View
B+
Retailer 6
-
$982 AUD
$690 USD
View
B+
Retailer 7
-
$1,082 AUD
£598 GBP
View
B+
Retailer 8
-
$1,085 AUD
$762 USD
View
B+
Retailer 9
-
$1,170 AUD
€783 EUR
View
B+
Retailer 10
-
$1,281 AUD
$900 USD
View
B+
Retailer 11
-
$1,349 AUD
$948 USD
View
B
Retailer 12
-
$1,722 AUD
$1,210 USD
View
B
Retailer 13
-
$1,762 AUD
$1,238 USD
View
B
Retailer 14
-
$2,333 AUD
$1,639 USD
View
Most Expensive
B
MOH London
2457007520 · Oct 29
$2,851 AUD
£1,577 GBP
View
14 more retailers have this diamond
Prices start from $585 AUDSave up to $2,266 AUD

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
$585 AUD