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Round|Lab Grown|IGI

1.63ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG12400612

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12400612

Diamond specifications and retailer prices

From $505 AUD
$355 USD
As of October 26, 2026
Save $2,203 AUD (81%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,484 AUD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.63ct lab-grown round diamond

This 1.63ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12400612 or 12400612. Listed at 20 retailers as of October 26, 2026, with a 436% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.63
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12400612
Dimensions7.49 × 7.53 × 4.70 mm
L/W Ratio1.01
Cert comments
As Grown - No indications of post-growth treatment. This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process.
Top View
7.49 mm7.53 mm1.63 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12400612
Side View
Table 57.5%Crown 35.5°Girdle: MediumPavilion 41.5°Culet: NoneDepth 62.6%

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 26
Current: $4,484 AUD|Low: $505 AUD|High: $4,484 AUD|Avg: $1,442 AUD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 7
Retailer 8
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Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 28, 2026
Retailer 16$505 AUD
Retailer 14$587 AUD
Retailer 17$622 AUD
Retailer 12$628 AUD
Retailer 19$628 AUD
Retailer 10$705 AUD
Retailer 4$840 AUD
Retailer 5$1,018 AUD
Retailer 15$1,103 AUD
Retailer 8$1,113 AUD
Retailer 2$1,125 AUD
Retailer 11$1,228 AUD
Retailer 6$1,239 AUD
Retailer 3$1,839 AUD
Retailer 7$1,949 AUD
Retailer 18$2,225 AUD
Retailer 9$2,444 AUD
Retailer 13$2,708 AUD
Do Amore Diamonds$4,484 AUD

12 data points across 19 retailers

20 retailers$505 AUD to $2,708 AUD

A
Cheapest Retailer
-
$505 AUD
$355 USD
A
Retailer 2
-
$587 AUD
$412 USD
View
A
Retailer 3
-
$622 AUD
$437 USD
View
Retailer 4
-
$628 AUD
$441 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$628 AUD
$441 USD
View
A
Retailer 6
-
$705 AUD
$495 USD
View
B+
Retailer 7
-
$840 AUD
$590 USD
View
Retailer 8
-
$1,018 AUD
$715 USD
View
Price last confirmed 11 days ago
B+
Retailer 9
-
$1,103 AUD
$775 USD
View
B+
Retailer 10
-
$1,113 AUD
$782 USD
View
B+
Retailer 11
-
$1,125 AUD
£622 GBP
View
B+
Retailer 12
-
$1,228 AUD
$863 USD
View
Retailer 13
-
$1,239 AUD
£686 GBP
View
Price last confirmed 14 days ago
B
Retailer 14
-
$1,839 AUD
$1,292 USD
View
B
Retailer 15
-
$1,949 AUD
$1,369 USD
View
B
Retailer 16
-
$2,093 AUD
$1,470 USD
View
B
Retailer 17
-
$2,225 AUD
$1,563 USD
View
B
Retailer 18
-
$2,444 AUD
$1,717 USD
View
B
Retailer 19
-
$2,708 AUD
£1,498 GBP
View
Most Expensive
Do Amore Diamonds
27-C9BBFF820 · Oct 29
$4,484 AUD
$3,150 USD
View
Price under review
19 more retailers have this diamond
Prices start from $505 AUDSave up to $2,203 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
1.63ct Round
$505 AUD