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Round|Lab Grown|IGI

1.78ct I SI2 Round Lab Grown Diamond

ID • I/SI2 • IGI LG470149591

Shape and cutting style on the report: Round brilliant

Certificate IGI LG470149591

Diamond specifications and retailer prices

From $480 AUD
$337 USD
As of October 29, 2026
Save $2,091 AUD (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,571 AUD at MOH London · As of October 25, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG470149591 or 470149591. Listed at 15 retailers as of October 25, 2026, with prices from $480 to $2,571, a $2,091 spread on the same certified stone. MOH London lists it at $2,571. 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
I
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG470149591
Dimensions7.77 × 7.82 × 4.80 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.77 mm7.82 mm1.78 ctI / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG470149591
Side View
Table 57.0%Crown 35.2°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.6%

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 29
Current: $2,571 AUD|Low: $480 AUD|High: $2,580 AUD|Avg: $1,248 AUD|-0.4%
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
Retailer 14
October 30, 2026
Retailer 12$480 AUD
Retailer 9$557 AUD
Retailer 8$595 AUD
Retailer 14$595 AUD
Retailer 2$623 AUD
Retailer 7$770 AUD
Retailer 10$1,082 AUD
Retailer 5$1,104 AUD
Retailer 3$1,160 AUD
Retailer 6$1,220 AUD
Retailer 11$1,747 AUD
Retailer 4$1,926 AUD
Retailer 13$2,112 AUD
MOH London$2,571 AUD

14 data points across 14 retailers

15 retailers$480 AUD to $2,571 AUD

A
Cheapest Retailer
-
$480 AUD
$337 USD
A
Retailer 2
-
$557 AUD
$391 USD
View
A
Retailer 3
-
$595 AUD
$418 USD
View
A
Retailer 4
-
$595 AUD
$418 USD
View
B+
Retailer 5
-
$623 AUD
$438 USD
View
A
Retailer 6
-
$770 AUD
£426 GBP
View
A
Retailer 7
-
$1,082 AUD
$760 USD
View
A
Retailer 8
-
$1,104 AUD
$775 USD
View
A
Retailer 9
-
$1,160 AUD
$815 USD
View
A
Retailer 10
-
$1,220 AUD
$857 USD
View
B+
Retailer 11
-
$1,747 AUD
$1,227 USD
View
B+
Retailer 12
-
$1,765 AUD
$1,240 USD
View
B+
Retailer 13
-
$1,926 AUD
$1,353 USD
View
B+
Retailer 14
-
$2,112 AUD
$1,484 USD
View
Most Expensive
B+
MOH London
LG470149591 · Oct 25
$2,571 AUD
£1,422 GBP
View
14 more retailers have this diamond
Prices start from $480 AUDSave up to $2,091 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
$480 AUD