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Round|Lab Grown|IGI

1.78ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG598316926

Shape and cutting style on the report: Round brilliant

Certificate IGI LG598316926

Diamond specifications and retailer prices

From $1,368 SGD
$1,070 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: $1,368 SGD at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG598316926 or 598316926. Listed at a single retailer as of November 2, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598316926
Dimensions7.78 × 7.75 × 4.77 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
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
7.78 mm7.75 mm1.78 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598316926
Side View
Table 57.0%Crown 35°Girdle: MediumPavilion 40.6°Culet: NoneDepth 61.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: $1,368 SGD|Low: $223 SGD|High: $1,854 SGD|Avg: $1,078 SGD|-26.2%
Brilliant Earth
Retailer 2
Retailer 3
October 4, 2026
Retailer 3$223 SGD
Retailer 2$1,083 SGD
Brilliant Earth$1,368 SGD

54 data points across 3 retailers

1 retailer

B
Brilliant Earth
8076030B · Nov 2
$1,368 SGD
$1,070 USD
View

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B
1.78ct Round
$1,368 SGD