CaratHunter
Plans
Round|Lab Grown|IGI

1.58ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG12378004

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12378004

Diamond specifications and retailer prices

From $485 AUD
$341 USD
As of November 1, 2026
Save $3,828 AUD (89%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,314 AUD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.58ct lab-grown round diamond

This 1.58ct lab-grown round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12378004 or 12378004. Listed at 18 retailers as of October 31, 2026, with prices from $485 to $4,314, a $3,828 spread on the same certified stone. Do Amore Diamonds lists it at $4,314. 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

1.58
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12378004
Dimensions7.42 × 7.47 × 4.64 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
7.42 mm7.47 mm1.58 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12378004
Side View
Table 59.0%Crown 35.5°Girdle: MED-UNDPavilion 41.4°Culet: NoneDepth 62.2%

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: Nov 1
Current: $4,314 AUD|Low: $485 AUD|High: $4,314 AUD|Avg: $1,389 AUD
Do Amore Diamonds
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 1, 2026
Retailer 17$485 AUD
Retailer 14$564 AUD
Retailer 12$595 AUD
Retailer 5$602 AUD
Retailer 13$602 AUD
Retailer 18$720 AUD
Retailer 6$819 AUD
Retailer 7$961 AUD
Retailer 9$1,039 AUD
Retailer 11$1,073 AUD
Retailer 15$1,078 AUD
Retailer 10$1,181 AUD
Retailer 16$1,767 AUD
Retailer 8$1,818 AUD
Retailer 4$2,137 AUD
Retailer 3$2,358 AUD
Retailer 2$2,598 AUD
Do Amore Diamonds$4,314 AUD

15 data points across 18 retailers

18 retailers$485 AUD to $4,314 AUD

A
Cheapest Retailer
-
$485 AUD
$341 USD
A
Retailer 2
-
$564 AUD
$396 USD
View
B+
Retailer 3
-
$595 AUD
$418 USD
View
A
Retailer 4
-
$602 AUD
$423 USD
View
Retailer 5
-
$602 AUD
$423 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$720 AUD
$506 USD
View
A
Retailer 7
-
$819 AUD
$575 USD
View
Retailer 8
-
$961 AUD
$675 USD
View
Price last confirmed 11 days ago
A
Retailer 9
-
$1,039 AUD
$730 USD
View
A
Retailer 10
-
$1,073 AUD
£593 GBP
View
A
Retailer 11
-
$1,078 AUD
$757 USD
View
A
Retailer 12
-
$1,181 AUD
$829 USD
View
A
Retailer 13
-
$1,767 AUD
$1,241 USD
View
A
Retailer 14
-
$1,818 AUD
$1,277 USD
View
B+
Retailer 15
-
$2,137 AUD
$1,501 USD
View
B+
Retailer 16
-
$2,358 AUD
$1,657 USD
View
B+
Retailer 17
-
$2,598 AUD
£1,437 GBP
View
Most Expensive
B
Do Amore Diamonds
27-9CA57A5A7 · Oct 31
$4,314 AUD
$3,030 USD
View
17 more retailers have this diamond
Prices start from $485 AUDSave up to $3,828 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
1.58ct Round
$485 AUD