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Round|Lab Grown|IGI

1.78ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG573372926

Shape and cutting style on the report: Round brilliant

Certificate IGI LG573372926

Diamond specifications and retailer prices

From $299 AUD
$210 USD
As of October 29, 2026
Save $2,918 AUD (91%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,217 AUD at Jared · As of October 28, 2026
View at Jared

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 LG573372926 or 573372926. Listed at 11 retailers as of October 28, 2026, with prices from $299 to $3,217, a $2,918 spread on the same certified stone. Jared lists it at $3,217. 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 angle33.8°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG573372926
Dimensions7.78 × 7.83 × 4.74 mm
L/W Ratio1.01
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 mm7.83 mm1.78 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG573372926
Side View
Table 58.5%Crown 33.8°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.6%

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: $1,652 AUD|Low: $248 AUD|High: $2,947 AUD|Avg: $1,148 AUD|-1.7%
Retailer 1
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 12$299 AUD
Retailer 13$339 AUD
Retailer 11$347 AUD
Retailer 10$638 AUD
Retailer 6$757 AUD
Retailer 4$800 AUD
Retailer 5$877 AUD
Retailer 3$985 AUD
Retailer 7$1,199 AUD
Retailer 8$1,318 AUD
Retailer 1$1,652 AUD
Retailer 2$2,064 AUD
Retailer 9$2,876 AUD

36 data points across 13 retailers

11 retailers$299 AUD to $3,217 AUD

A
Cheapest Retailer
-
$299 AUD
$210 USD
A
Retailer 2
-
$339 AUD
$238 USD
View
Final sale: no returns
A
Retailer 3
-
$347 AUD
$244 USD
View
B+
Retailer 4
-
$638 AUD
$448 USD
View
A
Retailer 5
-
$757 AUD
£419 GBP
View
Retailer 6
-
$1,199 AUD
$842 USD
View
Price last confirmed 7 days ago
B+
Retailer 7
-
$1,318 AUD
$926 USD
View
B
Retailer 8
-
$1,652 AUD
£914 GBP
View
B
Retailer 9
-
$2,064 AUD
$1,450 USD
View
B
Retailer 10
-
$2,876 AUD
$2,020 USD
View
Most Expensive
B
Jared
150062141 · Oct 28
$3,217 AUD
$2,260 USD
View
10 more retailers have this diamond
Prices start from $299 AUDSave up to $2,918 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
$299 AUD